U.S. patent application number 15/120567 was filed with the patent office on 2017-01-12 for agitation unit and beverage preparation apparatus.
This patent application is currently assigned to Sharp Kabushiki Kaisha. The applicant listed for this patent is SHARP KABUSHIKI KAISHA. Invention is credited to Kimiko MIEDA, Masaru MISUMI, Yasuaki SAKANE, Hidekazu SHIMA.
Application Number | 20170007067 15/120567 |
Document ID | / |
Family ID | 55439671 |
Filed Date | 2017-01-12 |
United States Patent
Application |
20170007067 |
Kind Code |
A1 |
SHIMA; Hidekazu ; et
al. |
January 12, 2017 |
AGITATION UNIT AND BEVERAGE PREPARATION APPARATUS
Abstract
An agitation unit includes an agitation tank to which a liquid
is supplied and an agitation member which agitates the liquid
supplied to the agitation tank. The agitation tank has an area of
opening in a horizontal direction decreasing in a downward
direction.
Inventors: |
SHIMA; Hidekazu; (Sakai-shi,
JP) ; MISUMI; Masaru; (Sakai-shi, JP) ; MIEDA;
Kimiko; (Sakai-shi, JP) ; SAKANE; Yasuaki;
(Sakai-shi, JP) |
|
Applicant: |
Name |
City |
State |
Country |
Type |
SHARP KABUSHIKI KAISHA |
Sakai-shi |
|
JP |
|
|
Assignee: |
Sharp Kabushiki Kaisha
Osaka
JP
|
Family ID: |
55439671 |
Appl. No.: |
15/120567 |
Filed: |
August 25, 2015 |
PCT Filed: |
August 25, 2015 |
PCT NO: |
PCT/JP2015/073806 |
371 Date: |
August 22, 2016 |
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
A47J 31/44 20130101;
A47J 43/046 20130101; A47J 43/08 20130101; A47J 31/40 20130101;
A47J 31/401 20130101 |
International
Class: |
A47J 31/40 20060101
A47J031/40; A47J 43/046 20060101 A47J043/046; A47J 43/08 20060101
A47J043/08; A47J 31/44 20060101 A47J031/44 |
Foreign Application Data
Date |
Code |
Application Number |
Sep 4, 2014 |
JP |
2014-180356 |
Sep 4, 2014 |
JP |
2014-180358 |
Sep 5, 2014 |
JP |
2014-181457 |
Claims
1. An agitation unit comprising: an agitation tank to which a
liquid is supplied; and an agitation member which agitates the
liquid supplied to the agitation tank, the agitation tank having an
area of opening in a horizontal direction decreasing in a downward
direction.
2. The agitation unit according to claim 1, wherein a guideline
amount of supply of the liquid is predetermined, and a liquid level
position when the guideline amount of supply is minimal is located
above an upper surface of the agitation member.
3. The agitation unit according to claim 1, wherein the agitation
member is provided at a bottom portion of the agitation tank.
4. The agitation unit according to claim 1, wherein the agitation
tank has such a curved shape that the area of opening in the
horizontal direction decreases in the downward direction.
5. A beverage preparation apparatus comprising: a milling unit
which obtains powders by grating an object to be grated; and an
agitation unit to which the powders and a liquid are supplied, the
agitation unit according to claim 1 being employed as the agitation
unit.
6. A beverage preparation apparatus comprising: an agitation tank;
an agitation member which agitates a liquid supplied to the
agitation tank; an agitation member drive portion which
rotationally drives the agitation member; a discharge mechanism
which is provided in the agitation tank and discharges the liquid
from the agitation tank to outside; and a control unit which
controls the agitation member drive portion, the control unit
controlling the agitation member drive portion such that the
agitation member is rotationally driven when the discharge
mechanism discharges the liquid to the outside.
7. The beverage preparation apparatus according to claim 6, wherein
the control unit controls the agitation member drive portion such
that the agitation member is intermittently rotationally
driven.
8. The beverage preparation apparatus according to claim 6, the
beverage preparation apparatus further comprising: an operation
portion for operating the discharge mechanism; and a sensing device
which senses timing of an operation of the operation portion,
wherein the control unit receives input of a sensing signal
indicative of sensing of the timing from the sensing device and
controls the agitation member drive portion such that the agitation
member is rotationally driven after a prescribed period of time has
elapsed since discharging of the liquid from the discharge
mechanism to the outside.
9. The beverage preparation apparatus according to claim 6, the
beverage preparation apparatus further comprising: an operation
portion for operating the discharge mechanism; and a sensing device
which senses timing of an operation of the operation portion,
wherein the control unit receives input of a sensing signal
indicative of sensing of the timing from the sensing device and
controls the agitation member drive portion such that the agitation
member is rotationally driven before the liquid is discharged from
the discharge mechanism to the outside.
10. The beverage preparation apparatus according to claim 6, the
beverage preparation apparatus further comprising an input portion
for indicating a time period for the agitation member to be
rotationally driven and/or the number of rotations.
11. An agitation unit comprising: an agitation tank to which a
liquid is supplied; an agitation member which agitates the liquid
supplied to the agitation tank; and a discharge mechanism which
discharges an agitated liquid produced as a result of agitation by
the agitation member to outside, the agitated liquid including a
first layer and a second layer which is separated as an upper layer
based on a difference in specific gravity from the first layer, and
the discharge mechanism having a suction port located near a
boundary portion between the first layer and the second layer and
discharging the agitated liquid suctioned through the suction
port.
12. The agitation unit according to claim 11, wherein the discharge
mechanism is provided to be able to select between a first
discharge path through which the agitated liquid including the
first layer is discharged and a second discharge path through which
the agitated liquid including the second layer is discharged.
13. The agitation unit according to claim 11, the agitation unit
further comprising a float member which follows displacement of the
boundary portion between the first layer and the second layer,
wherein the float member is disposed around the suction port, and
the suction port follows displacement of the boundary portion owing
to the float member and suctions the agitated liquid containing the
second layer.
14. The agitation unit according to claim 11, wherein the suction
port is provided in a side surface of the agitation tank so as to
be opened and closed, and the agitated liquid containing the first
layer and the second layer is suctioned through the suction port
while the suction port is open.
15. A beverage preparation apparatus comprising: a milling unit
which obtains powders by grating an object to be grated; and an
agitation unit to which the powders and a liquid are supplied, the
agitation unit according to claim 11 being employed as the
agitation unit.
Description
TECHNICAL FIELD
[0001] The present invention relates to an agitation unit including
an agitation tank and an agitation member, and a beverage
preparation apparatus.
BACKGROUND ART
[0002] Various types of agitation units which can produce fine
foams in order to make a taste of beverages milder have
conventionally been developed. For example, Japanese National
Patent Publication No. 2010-535577 (PTD 1) discloses such an
agitation unit.
[0003] In the agitation unit disclosed in PTD 1, electric power is
supplied to a drive portion through a conduction path provided in a
container (an agitation tank) by placing the container on a base
plate connected to a power supply. Thus, the drive portion causes
an agitation member to agitate and froth a liquid (milk) in an
agitation tank. A user removes the container from the base plate by
holding a handle provided in the container and pours the frothed
milk from a lip into a cup.
[0004] Various types of beverage preparation apparatuses including
agitation means which can produce fine foams in order to make a
taste of a beverage milder have conventionally been developed.
[0005] For example, PTD 1 and Japanese Patent Laying-Open No.
2009-163622 (PTD 2) each disclose a beverage preparation apparatus
including such agitation means.
[0006] The beverage preparation apparatus in PTD 1 includes the
features the same as described above so that the agitation member
agitates and frothes a liquid (milk) in the agitation tank. A user
removes the container from the base plate and pours frothed milk
from a lip into a cup.
[0007] In the beverage preparation apparatus disclosed in PTD 2,
initially, cream powders and sugar necessary for one cup are
supplied into a cup from a sub ingredient supply portion, and in
succession, hot water for preparation of powders is supplied from a
hot water supply portion into the cup. An agitation portion
provided at a tip end of an agitation shaft is immersed in the hot
water for preparation in the cup and the agitation shaft is rotated
by an agitation drive portion, so that whipped cream is produced.
Then, the agitation shaft and the agitation portion are moved out
of the cup and a coffee liquid is supplied from a coffee
preparation portion into the cup.
[0008] Various agitation units which agitate a liquid in an
agitation tank such as a container and beverage preparation
apparatuses have recently been developed. For example, Japanese
Patent Laying-Open No. 2004-065325 (PTD 3), PTD 1, and PTD 2 each
disclose such an agitation unit or a beverage preparation
apparatus.
[0009] In the beverage preparation apparatus disclosed in PTD 3,
juice produced as a result of rotation of a cutter disposed in a
mixer container is forcibly transferred to a juice extraction pipe
by using a juice extraction pump. By constantly integrally rotating
the cutter and the juice extraction pump while a valve for opening
and closing the juice extraction pipe is closed, juice can be
produced and agitated. By opening the valve in this state, juice
uniform in concentration can be discharged to the outside of the
container.
[0010] The agitation unit disclosed in PTD 1 includes the features
the same as described above, so that the agitation member agitates
and frothes a liquid (milk) in the agitation tank. A user removes a
container from the base plate and pours frothed milk from a lip
into a cup.
[0011] The beverage preparation apparatus disclosed in PTD 2
includes the features the same as described above, so that the
agitation portion provided at the tip end of the agitation shaft is
immersed in hot water for preparation in the cup and the agitation
shaft is rotated by the agitation drive portion, so that whipped
cream is produced. Then, the agitation shaft and the agitation
portion are moved out of the cup and a coffee liquid is supplied
from the coffee preparation portion into the cup.
CITATION LIST
Patent Document
[0012] PTD 1: Japanese National Patent Publication No. 2010-535577
[0013] PTD 2: Japanese Patent Laying-Open No. 2009-163622 [0014]
PTD 3: Japanese Patent Laying-Open No. 2004-065325
SUMMARY OF INVENTION
Technical Problem
[0015] In the agitation unit disclosed in PTD 1, however, the
agitation member is coupled to drive means with a coupling shaft
being interposed, the coupling shaft extending downward from the
drive means arranged above the container. Therefore, agitation
means is arranged at a considerable distance from a bottom portion
of the container. The container has a cylindrical shape with bottom
which has an area of opening substantially constant from an upper
portion to the bottom portion or a cylindrical shape with bottom
which has an area of opening increasing from the upper portion
toward the bottom portion.
[0016] Thus, in the agitation unit disclosed in PTD 1, in order to
sufficiently agitate a liquid to be frothed, a considerable amount
of liquid should be supplied into the container so that a spiral
spring (an agitation portion) which contributes to agitation in the
agitation member is entirely immersed in the liquid. When an amount
of supply of a liquid is small, the agitation member is located
above a liquid level and it is difficult to sufficiently agitate
the liquid.
[0017] Displacement in height of the liquid level which varies
depending on an amount of supply of the liquid cannot be
suppressed. Therefore, when an amount of supply of the liquid is
greater than a prescribed amount of supply, increase in height of a
liquid level cannot be suppressed and the liquid level is
excessively distant from the agitation member. Then, air cannot
sufficiently be taken in during agitation and sufficient frothing
is difficult.
[0018] In a milk frother disclosed in PTD 1, when pouring of milk
containing foams from the lid into a cup is attempted, milk in a
state of a liquid greater in specific gravity is poured first and
frothed milk lower in specific gravity (foams of milk) remains on
an inner wall of the container. Since liquids different in specific
gravity are thus poured separately, it has been difficult to
discharge a liquid having desired specific gravity into a cup in
accordance with preference of a user.
[0019] In the beverage preparation apparatus disclosed in PTD 2,
coffee is supplied into a cup after cream (foams of cream)
previously whipped in the cup is produced. Therefore, though foams
of cream are not left unserved in the cup, one serving of a
beverage can only be prepared in the cup. Therefore, it is
difficult to apply the feature of the beverage preparation
apparatus disclosed in PTD 2 to a beverage preparation apparatus
which prepares several servings of a beverage in a mass.
[0020] In the beverage preparation apparatus disclosed in PTD 3, a
juice extraction pump driven by the drive portion should be
provided in a portion of connection between the opening portion
provided at the bottom portion of the container and the juice
extraction pipe and a structure is complicated.
[0021] In the milk frother disclosed in PTD 1, when pouring of milk
containing foams from the lid into a cup is attempted, milk in a
state of a liquid greater in specific gravity is poured first and
frothed milk smaller in specific gravity (foams of milk) remains on
the inner wall of the container. Therefore, it has been difficult
to efficiently discharge a liquid containing a layer small in
specific gravity from a liquid separated into different layers
owing to a difference in specific gravity.
[0022] In the beverage preparation apparatus disclosed in PTD 2,
coffee is supplied into a cup after cream (foams of cream) whipped
previously in the cup is produced. Therefore, though foams of cream
are not left unserved in the cup, one serving of a beverage can
only be prepared in the cup. Therefore, it is difficult to apply
the agitation mechanism disclosed in PTD 2 to a beverage
preparation apparatus which prepares a desired number of servings
of a beverage such as several servings in a mass.
[0023] The present invention was made in view of the problems as
above, and a first object of the present invention is to provide an
agitation unit and a beverage preparation apparatus which can
sufficiently agitate a liquid even though an amount of a supplied
liquid is small.
[0024] The present invention was made in view of the problems as
above, and a second object of the present invention is to provide a
beverage preparation apparatus which can discharge a beverage
having desired specific gravity in accordance with preference of a
user while a desired amount of a beverage is prepared.
[0025] The present invention was made in view of the problems as
above, and a third object of the present invention is to provide an
agitation unit and a beverage preparation apparatus which have a
simplified construction, can agitate a desired amount of a supplied
liquid, and can reliably discharge a liquid containing a layer
small in specific gravity from an agitated liquid produced by
agitation and separated into different layers owing to a difference
in specific gravity.
Solution to Problem
[0026] An agitation unit based on a first aspect of the present
invention includes an agitation tank to which a liquid is supplied
and an agitation member which agitates the liquid supplied to the
agitation tank. The agitation tank has an area of opening in a
horizontal direction decreasing in a downward direction.
[0027] In the agitation unit based on the present invention,
preferably, a guideline amount of supply of the liquid is
predetermined, and in this case, preferably, a liquid level
position when the guideline amount of supply is minimal is located
above an upper surface of the agitation member.
[0028] In the agitation unit based on the first aspect of the
present invention, preferably, the agitation member is provided at
a bottom portion of the agitation tank.
[0029] In the agitation unit based on the first aspect of the
present invention, preferably, the agitation tank has such a curved
shape that the area of opening in the horizontal direction
decreases in the downward direction.
[0030] A beverage preparation apparatus based on the first aspect
of the present invention includes a milling unit which obtains
powders by grating an object to be grated and an agitation unit to
which the powders and a liquid are supplied, and the agitation unit
described above is employed as the agitation unit.
[0031] A beverage preparation apparatus based on a second aspect of
the present invention includes an agitation tank, an agitation
member which agitates a liquid supplied to the agitation tank, an
agitation member drive portion which rotationally drives the
agitation member, a discharge mechanism which is provided in the
agitation tank and discharges the liquid from the agitation tank to
the outside, and a control unit which controls the agitation member
drive portion, and the control unit controls the agitation member
drive portion such that the agitation member is rotationally driven
when the discharge mechanism discharges the liquid to the
outside.
[0032] In the beverage preparation apparatus based on the second
aspect of the present invention, preferably, the control unit
controls the agitation member drive portion such that the agitation
member is intermittently rotationally driven.
[0033] The beverage preparation apparatus based on the second
aspect of the present invention preferably further includes an
operation portion for operating the discharge mechanism and a
sensing device which senses timing of an operation of the operation
portion. In this case, the control unit may receive input of a
sensing signal indicative of sensing of the timing from the sensing
device and control the agitation member drive portion such that the
agitation member is rotationally driven after a prescribed period
of time has elapsed since discharging of the liquid from the
discharge mechanism to the outside.
[0034] The beverage preparation apparatus based on the second
aspect of the present invention preferably further includes an
operation portion for operating the discharge mechanism and a
sensing device which senses timing of an operation of the operation
portion. In this case, the control unit may receive input of a
sensing signal indicative of sensing of the timing from the sensing
device and control the agitation member drive portion such that the
agitation member is rotationally driven before the liquid is
discharged from the discharge mechanism to the outside.
[0035] The beverage preparation apparatus based on the second
aspect of the present invention may further include an input
portion for indicating a time period for the agitation member to be
rotationally driven and/or the number of rotations.
[0036] An agitation unit based on a third aspect of the present
invention includes an agitation tank to which a liquid is supplied,
an agitation member which agitates the liquid supplied to the
agitation tank, and a discharge mechanism which discharges an
agitated liquid produced as a result of agitation by the agitation
member to the outside. The agitated liquid contains a first layer
and a second layer which is separated as an upper layer based on a
difference in specific gravity from the first layer. The discharge
mechanism has a suction port located in the vicinity of a boundary
portion between the first layer and the second layer and discharges
the agitated liquid suctioned through the suction port.
[0037] In the agitation unit based on the third aspect of the
present invention, the discharge mechanism may be provided to be
able to select between a first discharge path through which the
agitated liquid containing the first layer is discharged and a
second discharge path through which the agitated liquid containing
the second layer is discharged.
[0038] The agitation unit based on the third aspect of the present
invention preferably further includes a float member which follows
displacement of the boundary portion between the first layer and
the second layer. In this case, the float member is preferably
disposed around the suction port, and the suction port preferably
follows displacement of the boundary portion owing to the float
member and suctions the agitated liquid containing the second
layer.
[0039] In the agitation unit based on the third aspect of the
present invention, the suction port may be provided in a side
surface of the agitation tank so as to be opened and closed, and
the agitated liquid containing the first layer and the second layer
may be suctioned through the suction port while the suction port is
open.
[0040] A beverage preparation apparatus based on the third aspect
of the present invention includes a milling unit which obtains
powders by grating an object to be grated and an agitation unit to
which the powders and a liquid are supplied. The agitation unit
described in any portion above is employed as the agitation
unit.
Advantageous Effects of Invention
[0041] According to the first aspect of the present invention, an
agitation unit and a beverage preparation apparatus which can
sufficiently agitate a liquid even though an amount of a supplied
liquid is small can be provided.
[0042] According to the second aspect of the present invention, a
beverage preparation apparatus which can discharge a liquid having
desired specific gravity in accordance with preference of a user
while a desired amount of a beverage is prepared can be
provided.
[0043] According to the third aspect of the present invention, an
agitation unit and a beverage preparation apparatus which have a
simplified construction, can agitate a desired amount of a supplied
liquid, and can reliably discharge a liquid containing a layer
small in specific gravity from an agitated liquid produced by
agitation and separated into different layers owing to a difference
in specific gravity can be provided.
BRIEF DESCRIPTION OF DRAWINGS
[0044] FIG. 1 is an overall perspective view of a beverage
preparation apparatus according to Embodiment 1.
[0045] FIG. 2 is a cross-sectional view along the line II-II in
FIG. 1.
[0046] FIG. 3 is an overall view showing a schematic component of
the beverage preparation apparatus according to Embodiment 1.
[0047] FIG. 4 shows a first preparation flow showing discharge of
tea using the beverage preparation apparatus according to
Embodiment 1.
[0048] FIG. 5 shows a second preparation flow showing discharge of
tea using the beverage preparation apparatus according to
Embodiment 1.
[0049] FIG. 6 shows a third preparation flow showing discharge of
tea using the beverage preparation apparatus according to
Embodiment 1.
[0050] FIG. 7 is a perspective view showing an internal structure
of the beverage preparation apparatus according to Embodiment
1.
[0051] FIG. 8 is a perspective view of a milling unit according to
Embodiment 1.
[0052] FIG. 9 is an exploded perspective view of the milling unit
according to Embodiment 1.
[0053] FIG. 10 is a vertical cross-sectional view of the milling
unit according to Embodiment 1.
[0054] FIG. 11 is an exploded perspective view of an agitation unit
according to Embodiment 1.
[0055] FIG. 12 is a vertical cross-sectional view of the agitation
unit according to Embodiment 1.
[0056] FIG. 13 is a perspective view of an agitation blade
according to Embodiment 1.
[0057] FIG. 14 is an exploded perspective view showing a structure
of the agitation blade according to Embodiment 1.
[0058] FIG. 15 is a cross-sectional view along the line XV-XV shown
in FIG. 13.
[0059] FIG. 16 is a perspective view showing an agitation tank and
the agitation blade according to Embodiment 1.
[0060] FIG. 17 is a cross-sectional view along the line XVII-XVII
shown in FIG. 16.
[0061] FIG. 18 is a perspective view showing an agitation tank and
an agitation blade according to Embodiment 2.
[0062] FIG. 19 is a cross-sectional view along the line XIX-XIX
shown in FIG. 18.
[0063] FIG. 20 is a perspective view showing an agitation tank and
the agitation blade according to Embodiment 3.
[0064] FIG. 21 is a cross-sectional view along the line XXI-XXI
shown in FIG. 20.
[0065] FIG. 22 is a perspective view showing an agitation tank and
an agitation blade according to Embodiment 4.
[0066] FIG. 23 is a cross-sectional view along the line XXIII-XXIII
shown in FIG. 22.
[0067] FIG. 24 is a perspective view showing an agitation tank and
the agitation blade according to Embodiment 5.
[0068] FIG. 25 is a cross-sectional view along the line XXV-XXV
shown in FIG. 24.
[0069] FIG. 26 is a perspective view showing an agitation tank and
the agitation blade according to Embodiment 6.
[0070] FIG. 27 is a cross-sectional view along the line XXVII-XXVII
shown in FIG. 26.
[0071] FIG. 28 is a perspective view showing an agitation tank and
the agitation blade according to Embodiment 7.
[0072] FIG. 29 is a cross-sectional view along the line XXIX-XXIX
shown in FIG. 28.
[0073] FIG. 30 is a perspective view showing an agitation tank and
the agitation blade according to Embodiment 8.
[0074] FIG. 31 is a cross-sectional view along the line XXXI-XXXI
shown in FIG. 30.
[0075] FIG. 32 is a perspective view showing an agitation tank and
the agitation blade according to Embodiment 9.
[0076] FIG. 33 is a cross-sectional view along the line
XXXIII-XXXIII shown in FIG. 32.
[0077] FIG. 34 is a perspective view showing an agitation tank and
the agitation blade in a comparative form.
[0078] FIG. 35 is a cross-sectional view along the line XXXV-XXXV
shown in FIG. 34.
[0079] FIG. 36 is a diagram showing conditions and results of a
verification experiment conducted for confirming an effect of the
present invention.
[0080] FIG. 37 is an overall perspective view of a beverage
preparation apparatus according to present Embodiment 10.
[0081] FIG. 38 is a cross-sectional view along the line
XXXVIII-XXXVIII in FIG. 37.
[0082] FIG. 39 is an overall perspective view showing a schematic
component of the beverage preparation apparatus according to
Embodiment 10.
[0083] FIG. 40 is a block diagram showing a construction of the
beverage preparation apparatus according to Embodiment 10.
[0084] FIG. 41 shows a first preparation flow for preparing tea
using the beverage preparation apparatus according to Embodiment
10.
[0085] FIG. 42 shows a second preparation flow for preparing tea
using the beverage preparation apparatus according to Embodiment
10.
[0086] FIG. 43 shows a third preparation flow for preparing tea
using the beverage preparation apparatus according to Embodiment
10.
[0087] FIG. 44 is a perspective view showing an internal structure
of the beverage preparation apparatus according to Embodiment
10.
[0088] FIG. 45 is a perspective view of a milling unit according to
Embodiment 10.
[0089] FIG. 46 is an exploded perspective view of the milling unit
according to Embodiment 10.
[0090] FIG. 47 is a vertical cross-sectional view of the milling
unit according to Embodiment 10.
[0091] FIG. 48 is an exploded perspective view of an agitation unit
according to Embodiment 10.
[0092] FIG. 49 is a vertical cross-sectional view of the agitation
unit according to Embodiment 10.
[0093] FIG. 50 is a flowchart showing details of a discharging step
in a flow for preparation of a beverage using the beverage
preparation apparatus according to Embodiment 10.
[0094] FIG. 51 is a diagram showing a state in the agitation tank
in the step of starting agitation shown in FIG. 41.
[0095] FIG. 52 is a diagram showing a state in the agitation tank
after a prescribed period of time has elapsed since end of
agitation in the step of end of agitation shown in FIG. 41.
[0096] FIG. 53 is a diagram showing a state of tea discharged in
the discharging step shown in FIG. 41.
[0097] FIG. 54 is a flowchart showing details of the discharging
step in the flow for preparation of a beverage using the beverage
preparation apparatus according to Embodiment 11.
[0098] FIG. 55 is a flowchart showing details of the discharging
step in the flow for preparation of a beverage using the beverage
preparation apparatus according to Embodiment 12.
[0099] FIG. 56 is a flowchart showing an operation of the agitation
unit between the step of end of agitation preceding the discharging
step and the discharging step in the flow for preparation of a
beverage using the beverage preparation apparatus according to
Embodiment 13.
[0100] FIG. 57 is a cross-sectional view of a beverage preparation
apparatus according to Embodiment 14.
[0101] FIG. 58 is an overall perspective view of a beverage
preparation apparatus according to Embodiment 15.
[0102] FIG. 59 is a cross-sectional view along the line LIX-LIX in
FIG. 58.
[0103] FIG. 60 is an overall view showing a schematic component of
the beverage preparation apparatus according to Embodiment 15.
[0104] FIG. 61 shows a first preparation flow showing discharge of
tea using the beverage preparation apparatus according to
Embodiment 15.
[0105] FIG. 62 shows a second preparation flow showing discharge of
tea using the beverage preparation apparatus according to
Embodiment 15.
[0106] FIG. 63 shows a third preparation flow showing discharge of
tea using the beverage preparation apparatus according to
Embodiment 15.
[0107] FIG. 64 is a perspective view showing an internal structure
of the beverage preparation apparatus according to Embodiment
15.
[0108] FIG. 65 is a perspective view of a milling unit according to
Embodiment 15.
[0109] FIG. 66 is an exploded perspective view of the milling unit
according to Embodiment 15.
[0110] FIG. 67 is a vertical cross-sectional view of the milling
unit according to Embodiment 15.
[0111] FIG. 68 is an exploded perspective view of an agitation unit
according to Embodiment 15.
[0112] FIG. 69 is a vertical cross-sectional view of the agitation
unit according to Embodiment 15.
[0113] FIG. 70 is a schematic cross-sectional view showing an
agitated liquid produced in the agitation unit according to
Embodiment 15 and a discharge mechanism.
[0114] FIG. 71 is a schematic cross-sectional view showing a state
that the discharge mechanism shown in FIG. 70 is opened and a first
discharge path is defined.
[0115] FIG. 72 is a schematic cross-sectional view showing a state
that the discharge mechanism shown in FIG. 70 is opened and a
second discharge path is defined.
[0116] FIG. 73 is a schematic cross-sectional view showing an
agitated liquid produced in an agitation unit according to
Embodiment 16 and a discharge mechanism.
[0117] FIG. 74 is a schematic cross-sectional view showing a state
after some of the agitated liquid has been discharged from the
state shown in FIG. 73.
[0118] FIG. 75 is a schematic cross-sectional view showing an
agitated liquid produced in an agitation unit according to
Embodiment 17 and a discharge mechanism.
[0119] FIG. 76 is a schematic cross-sectional view showing a state
that the discharge mechanism of the agitation unit shown in FIG. 75
is opened and a second discharge path is defined.
[0120] FIG. 77 is a schematic cross-sectional view showing an
agitated liquid produced in an agitation unit according to
Embodiment 18 and a discharge mechanism.
[0121] FIG. 78 is a front view of the discharge mechanism shown in
FIG. 77.
[0122] FIG. 79 is a schematic cross-sectional view showing a state
that the discharge mechanism shown in FIG. 77 is opened and the
agitated liquid is discharged.
[0123] FIG. 80 is a schematic cross-sectional view showing an
agitated liquid produced in an agitation unit according to
Embodiment 19 and a discharge mechanism.
DESCRIPTION OF EMBODIMENTS
[0124] Embodiments of the present invention will be described
hereinafter in detail with reference to the drawings. In the
embodiments shown below, the same or common elements have the same
reference characters allotted in the drawings and description
thereof will not be repeated.
[0125] In the present embodiment, though a case that tea leaves are
used as an object to be grated and tea is prepared as a beverage
will be described by way of example, the object to be grated is not
limited to tea leaves, but the embodiment can also be applied to
preparation of a beverage with cereals, dried goods, and other
objects to be grated. Hereinafter, tea leaves mean a solid state
before grating, tea leaf powders mean grated tea leaves, and tea
means a beverage obtained by agitating (mixing) tea leaf powders
and hot water.
Embodiment 1
Beverage Preparation Apparatus 1
[0126] A beverage preparation apparatus 1 in the present embodiment
will be described with reference to FIGS. 1 to 3. FIG. 1 is an
overall perspective view of beverage preparation apparatus 1, FIG.
2 is a cross-sectional view along the line II-II in FIG. 1, and
FIG. 3 is an overall perspective view of a schematic component of
beverage preparation apparatus 1.
[0127] As shown in FIGS. 1 to 3, beverage preparation apparatus 1
uses tea leaves as an object to be grated and obtains tea leaf
powders by grating the tea leaves. The beverage preparation
apparatus uses the obtained tea leaf powders for preparing tea as a
beverage. Beverage preparation apparatus 1 includes an apparatus
main body 100 as a main body portion, a milling unit 300, an
agitation unit 500, a liquid storage tank 700, a liquid supply path
155 as a liquid supply portion (see FIG. 2), a tea leaf powder tray
800 as a powder reception portion, and a placement base 900.
Placement base 900 is provided to protrude forward on a front side
in a lower portion of apparatus main body 100 and a cup (not shown)
and tea leaf powder tray 800 can be placed thereon. Tea leaf powder
tray 800 is provided such that a user can move the tray by holding
the tray.
[0128] (Milling Unit 300)
[0129] Milling unit 300 is removably attached to a milling unit
attachment portion 180 provided on a front surface side of
apparatus main body 100. A milling driving force coupling mechanism
130 is provided in milling unit attachment portion 180 so as to
protrude forward and milling unit 300 is removably attached to this
milling driving force coupling mechanism 130. Milling unit 300
obtains driving force for milling tea leaves representing an object
to be grated by being coupled to milling driving force coupling
mechanism 130.
[0130] Tea leaves introduced from an upper portion of milling unit
300 into milling unit 300 are finely grated in milling unit 300.
The grated tea leaves are dropped and collected as tea leaf powders
on tea leaf powder tray 800 placed below milling unit 300. A
detailed structure of milling unit 300 will be described later with
reference to FIGS. 8 to 10.
[0131] (Liquid Storage Tank 700)
[0132] Liquid storage tank 700 is removably attached to a liquid
storage tank attachment portion 195 provided on an upper surface
side of apparatus main body 100. Liquid storage tank 700 includes a
tank main body 710 having an opening in an upper surface and a lid
portion 720 closing the opening in the upper surface of tank main
body 710. Liquid storage tank 700 stores such a liquid as water
which is introduced from the outside by removing lid portion
720.
[0133] A plurality of guidelines for showing guides for amounts of
a liquid to be stored in accordance with an amount of tea to be
prepared are provided on an inner circumferential surface of liquid
storage tank 700. For example, four guidelines are provided to
extend in a circumferential direction of the inner circumferential
surface. The four guidelines are provided at a distance from each
other in a vertical direction.
[0134] A first guideline located at a lowermost position indicates
a water level position when an amount of water recommended for
preparing half a cup of tea is introduced in liquid storage tank
700. In this case, half a cup is preferably within a range from 70
cc to 80 cc and preferably substantially 75 cc.
[0135] A second guideline located at a second position from a
bottom side indicates a water level position when an amount of
water recommended for preparing one serving of tea (a cup of tea)
is introduced in liquid storage tank 700. A third guideline located
at a third position from the bottom side indicates a water level
position when an amount of water recommended for preparing two
servings of tea (two cups of tea) is introduced in liquid storage
tank 700. A fourth guideline located at an uppermost position (the
fourth from the bottom side) indicates a water level position when
an amount of water recommended for preparing three servings of tea
(three cups of tea) is introduced in liquid storage tank 700. With
such guidelines, a guideline amount of supply of a liquid supplied
from liquid storage tank 700 into agitation unit 500 is
predetermined
[0136] (Liquid Supply Path 155)
[0137] Liquid supply path 155 is accommodated in apparatus main
body 100. Liquid supply path 155 is connected to liquid storage
tank 700 (see FIG. 7). Liquid supply path 155 is provided with a
supply port 171 on a side opposite to a side where liquid storage
tank 700 is connected. Liquid supply path 155 includes a hot water
supply pipe 150 and a hot water supply nozzle 170. Hot water supply
pipe 150 has one end side connected to liquid storage tank 700 and
the other end side connected to hot water supply nozzle 170. A
liquid introduced from liquid storage tank 700 into liquid supply
path 155 is supplied to agitation unit 500 through hot water supply
pipe 150 and hot water supply nozzle 170.
[0138] (Agitation Unit 500)
[0139] Agitation unit 500 includes an agitation blade 550 for
agitating a liquid and powders and agitation tank 510 accommodating
agitation blade 550. Agitation blade 550 corresponds to an
agitation member. Agitation tank 510 is removably attached to an
agitation tank attachment portion 190 provided on the front surface
side of apparatus main body 100. Agitation tank 510 is attached to
agitation tank attachment portion 190 such that a part of agitation
tank 510 protrudes from a front surface of apparatus main body 100
along a direction of normal to the front surface.
[0140] An agitation motor contactless table 140A is provided in
agitation tank attachment portion 190. Agitation unit 500 is placed
on agitation motor contactless table 140A. Agitation blade 550
provided in agitation unit 500 is rotated by an agitation motor
unit 140 and a permanent magnet 141 coupled thereto. Agitation
motor unit 140 and permanent magnet 141 are accommodated in
apparatus main body 100 so as to be located below agitation motor
contactless table 140A. Agitation motor unit 140 corresponds to an
agitation blade drive portion which rotationally drives agitation
blade 550.
[0141] Hot water supply nozzle 170 is provided above agitation tank
attachment portion 190 of apparatus main body 100. In apparatus
main body 100, a temperature of water in hot water supply pipe 150
is raised to a prescribed temperature and hot water is supplied
from hot water supply nozzle 170 into agitation tank 510. Hot water
prepared in apparatus main body 100 and tea leaf powders obtained
by milling unit 300 are introduced into agitation tank 510, and hot
water and tea leaf powders are agitated by agitation blade 550 in
agitation tank 510. Tea is thus prepared in agitation tank 510.
[0142] Tea prepared in agitation unit 500 can be poured into a cup
(not shown) placed on placement base 900 by operating an operation
lever 542 of a discharge port opening and closing mechanism 540
provided below agitation unit 500. A detailed structure of
agitation unit 500 will be described later with reference to FIGS.
11 and 12.
[0143] (Flow of Preparation of Tea (Beverage))
[0144] A flow of preparation of tea (beverage) with the use of
beverage preparation apparatus 1 will now be described with
reference to FIGS. 4 to 6. FIGS. 4 to 6 show first to third
preparation flows showing discharge of tea using beverage
preparation apparatus 1, respectively. A prescribed amount of tea
leaves is introduced into milling unit 300 and a prescribed amount
of water is stored in liquid storage tank 700.
[0145] (First Preparation Flow)
[0146] A first preparation flow will be described with reference to
FIG. 4. This first preparation flow is a flow in which grating of
tea leaves in milling unit 300 and supply of hot water from
apparatus main body 100 to agitation unit 500 are simultaneously
carried out.
[0147] In beverage preparation apparatus 1, milling of tea leaves
by milling unit 300 in a step 11 and supply of hot water from
apparatus main body 100 to agitation unit 500 in a step 13 are
simultaneously started. Then, milling of tea leaves by milling unit
300 ends in a step 12, and supply of hot water from apparatus main
body 100 to agitation unit 500 ends in a step 14.
[0148] In a step 15, tea leaf powders obtained in step 12 are
introduced into agitation unit 500 by a user.
[0149] Then, in a step 16, agitation of the tea leaf powders and
hot water in agitation unit 500 is started. In a step 17, agitation
of the tea leaf powders and hot water in agitation unit 500 ends.
In a step 18, tea is discharged into the cup placed on placement
base 900 as the user operates operation lever 542 of discharge port
opening and closing mechanism provided below agitation unit 500.
According to the present flow, since milling of tea leaves and
supply of hot water are simultaneously performed, a tea beverage
can efficiently be prepared in a short period of time.
[0150] (Second Preparation Flow)
[0151] A second preparation flow will be described with reference
to FIG. 5. This second preparation flow is a flow in which hot
water is supplied from apparatus main body 100 to agitation unit
500 after tea leaves are grated in milling unit 300.
[0152] In beverage preparation apparatus 1, in a step 21, milling
of tea leaves by milling unit 300 is started. In a step 22, milling
of tea leaves by milling unit 300 ends. In a step 23, tea leaf
powders obtained in step 22 are introduced into agitation unit 500
by a user.
[0153] In a step 24, supply of hot water from apparatus main body
100 to agitation unit 500 is started. In a step 25, supply of hot
water from apparatus main body 100 to agitation unit 500 ends.
[0154] Then, in a step 26, agitation of the tea leaf powders and
hot water in agitation unit 500 is started. In a step 27, agitation
of the tea leaf powders and hot water in agitation unit 500 ends.
In a step 28, tea is discharged into the cup placed on placement
base 900 as the user operates operation lever 542 of discharge port
opening and closing mechanism 540 provided below agitation unit
500. According to the present flow, since hot water is supplied
after tea leaves are milled, lowering in temperature of hot water
can be suppressed.
[0155] (Third Preparation Flow)
[0156] A third preparation flow will be described with reference to
FIG. 6. This third preparation flow includes a step of cooling hot
water by agitation in agitation unit 500.
[0157] In beverage preparation apparatus 1, milling of tea leaves
by milling unit 300 in a step 31 and supply of hot water from
apparatus main body 100 to agitation unit 500 in a step 33 are
simultaneously started. In a step 34, supply of hot water from
apparatus main body 100 to agitation unit 500 ends.
[0158] Then, in a step 32, milling of tea leaves by milling unit
300 ends, and in a step 35, cooling by agitation of hot water
supply is started in agitation unit 500. In a step 36, cooling by
agitation of hot water supply in agitation unit 500 ends.
[0159] In a step 37, the tea leaf powders obtained in step 32 are
introduced into agitation unit 500 by a user.
[0160] Then, in a step 38, agitation of the tea leaf powders and
hot water in agitation unit 500 is started. In a step 39, agitation
of the tea leaf powders and hot water in agitation unit 500 ends.
In a step 40, tea is discharged into the cup placed on placement
base 900 as the user operates operation lever 542 of discharge port
opening and closing mechanism 540 provided below agitation unit
500. According to the present flow, a tea beverage can be prepared
at an appropriate temperature from tea leaves suitable for hot
water at a relatively low temperature, such as gyokuro.
[0161] (Internal Structure of Apparatus Main Body 100)
[0162] An internal structure of apparatus main body 100 will now be
described with reference to FIG. 7. FIG. 7 is a perspective view
showing the internal structure of beverage preparation apparatus 1.
In apparatus main body 100 of beverage preparation apparatus 1, a
control unit 110 including a printed circuit board on which
electronic components are mounted is arranged on a front surface
side of liquid storage tank 700. Based on input of a start signal
by a user, the flow for preparation of tea is executed by control
unit 110.
[0163] A milling motor unit 120 for providing driving force to
milling unit 300 is arranged at a position below control unit 110.
Milling driving force coupling mechanism 130 provided to protrude
forward for transmitting driving force of milling motor unit 120 to
milling unit 300 is provided at a position below milling motor unit
120.
[0164] To a bottom surface of liquid storage tank 700, one end of
hot water supply pipe 150 extending once downward from the bottom
surface and then extending upward in a U shape is coupled. Hot
water supply nozzle 170 for pouring hot water into agitation tank
510 of agitation unit 500 is coupled to an upper end portion of hot
water supply pipe 150. A U-shaped heater 160 for heating water
which passes through hot water supply pipe 150 is attached to an
intermediate region of hot water supply pipe 150.
[0165] (Structure of Milling Unit 300)
[0166] A structure of milling unit 300 will now be described with
reference to FIGS. 8 to 10. FIG. 8 is a perspective view of milling
unit 300, FIG. 9 is an exploded perspective view of milling unit
300, and FIG. 10 is a vertical cross-sectional view of milling unit
300.
[0167] Milling unit 300 has a milling case 310 having a cylindrical
shape as a whole, and a window for coupling 300W in which milling
driving force coupling mechanism 130 is inserted is provided in a
side surface below. A storage portion 311 (see FIG. 10) for storing
tea leaf powders produced by an upper mill 360 and a lower mill 350
and a discharge path 312 communicating with storage portion 311 are
provided in milling case 310. An outlet port 312a for discharging
tea leaf powders into tea leaf powder tray 800 is provided at a
lower end portion of discharge path 312 which is a lowermost end
portion of milling case 310. Outlet port 312a is provided below an
opening portion 513 of a thermally insulated tank 512 (see FIG. 12)
which will be described later. Entry through outlet port 312a, of
steam resulting from hot water supplied into thermally insulated
tank 512 can thus be prevented.
[0168] Milling unit 300 includes upper mill 360 and lower mill 350
which grate an object to be grated and a lower mill support portion
340 to which lower mill 350 is attached. In milling case 310, lower
mill support portion 340, lower mill 350, and upper mill 360 are
successively provided from below.
[0169] Lower mill support portion 340 supports lower mill 350 from
a side opposite to a side where upper mill 360 is located (a side
below lower mill 350). Lower mill support portion 340 has a
substantially columnar main body portion 341, an engagement
protrusion portion 342, and a powder scraping portion 343. A
milling shaft 345 is provided on a lower surface of main body
portion 341 and extends downward. Milling shaft 345 is coupled to
milling driving force coupling mechanism 130. Lower mill support
portion 340 is thus rotatable while it supports lower mill 350.
[0170] Engagement protrusion portion 342 is provided on an upper
surface of main body portion 341 and protrudes upward. Engagement
protrusion portion 342 is a site for locking lower mill 350. Powder
scraping portion 343 is provided around a circumferential portion
of main body portion 341. Powder scraping portion 343 scrapes off
tea leaf powders stored in storage portion 311 and transports the
tea leaf powders to discharge path 312 as lower mill support
portion 340 rotates.
[0171] Lower mill 350 includes a main surface 350a arranged to be
opposed to a main surface 360a of upper mill 360, a main surface
350b located opposite to main surface 350a, and a circumferential
surface connecting main surface 350a and main surface 350b to each
other. A plurality of shear grooves are formed in main surface 350a
of lower mill 350. The plurality of shear grooves are provided, for
example, to extend along an equiangular spiral. The plurality of
shear grooves may be such that linear grooves extending from an
inner circumferential side toward an outer circumference are
radially provided.
[0172] An engagement recess portion 352 is provided in main surface
350b of lower mill 350. Engagement recess portion 352 is provided
at a position corresponding to engagement protrusion portion 342 of
lower mill support portion 340 and locked by engagement protrusion
portion 342. Lower mill 350 thus rotates in coordination with lower
mill support portion 340. A core 359 extending upward along a core
of a rotation shaft is provided in a central portion of lower mill
350.
[0173] Core 359 is provided to pass through a through hole 361
provided in a central portion of upper mill 360. Core 359 has a
helically provided helical blade 359a.
[0174] Upper mill 360 includes main surface 360a arranged to be
opposed to main surface 350a of lower mill 350, a main surface 360b
located opposite to main surface 360a, and a circumferential
surface connecting main surface 360a and main surface 360b to each
other. A shear groove is formed in main surface 360a of upper mill
360, as in main surface 350a of the lower mill.
[0175] Upper mill 360 is held by an upper mill holding member 370
arranged above the upper mill. A not-shown hole portion is provided
in an upper surface of upper mill 360. As a not-shown pin portion
provided in upper mill holding member 370 enters the hole portion,
rotation of upper mill 360 is prevented.
[0176] Upper mill holding member 370 includes a bottom surface
portion 371 provided with a hole portion 371a, an outer cylindrical
portion 372 erected upward from a circumference of bottom surface
portion 371, and an inner cylindrical portion 373 erected upward
from a circumference of hole portion 371a. Hole portion 371a is
provided to communicate with through hole 361 in upper mill 360. A
spring 381 pressing upper mill 360 downward and a spring holding
member 380 are accommodated in between outer cylindrical portion
372 and inner cylindrical portion 373. Spring 381 adjusts a grating
pressure applied between upper mill 360 and lower mill 350.
[0177] A hopper portion 320 for supplying an object to be grated in
between upper mill 360 and lower mill 350 is attached to a side of
an upper end opening portion 310b of milling case 310. Hopper
portion 320 has a top plate portion 321, a cylindrical portion 322,
and an object-to-be-grated inlet 325. Top plate portion 321 has
such a bowl shape that an opening portion 323 is provided
substantially in a central portion. Cylindrical portion 322 is
provided to extend downward from a circumference of opening portion
323. Cylindrical portion 322 is inserted in inner cylindrical
portion 373.
[0178] Object-to-be-grated inlet 325 is defined by opening portion
323 and cylindrical portion 322. A tip end side of core 359 is
accommodated in object-to-be-grated inlet 325. In cylindrical
portion 322, a plurality of linear ribs 391, 392, and 393 are
provided across object-to-be-grated inlet 325.
[0179] In grating tea leaves, hopper portion 320 is preferably
covered with a cover portion 330. Thus, after tea leaves are
introduced into object-to-be-grated inlet 325, entry of a foreign
matter into milling unit 300 and scattering of grated tea leaves
can be prevented. When tea leaves are to be introduced, cover
portion 330 is removed from hopper portion 320.
[0180] Tea leaves introduced into object-to-be-grated inlet 325 are
accommodated in a space defined by the upper surface of upper mill
360 exposed through upper mill holding member 370 and an inner
circumferential surface of cylindrical portion 322. Tea leaves
accommodated in the space are guided in between upper mill 360 and
lower mill 350 as helical blade 359a rotates with rotation of lower
mill 350.
[0181] Tea leaves guided in between upper mill 360 and lower mill
350 are grated and fall downward in a form of tea leaf powders from
a circumference of upper mill 360 and lower mill 350. Some of
fallen tea leaf powders is discharged through discharge path 312
into tea leaf powder tray 800 from outlet port 312a. Other fallen
tea leaf powders are stored in storage portion 311. Tea leaf
powders in storage portion 311 are transported to discharge path
312 and discharged from outlet port 312a into tea leaf powder tray
800 as powder scraping portion 343 rotates with rotation of lower
mill support portion 340.
[0182] (Structure of Agitation Unit 500)
[0183] A structure of agitation unit 500 will now be described with
reference to FIGS. 11 and 12. FIG. 11 is a perspective view of
agitation unit 500 and FIG. 12 is a vertical cross-sectional view
of agitation unit 500.
[0184] Agitation unit 500 is in a shape of a container having an
opening upper surface and includes agitation tank 510, agitation
blade 550, an agitation cover 530, and discharge port opening and
closing mechanism 540. Agitation tank 510 includes an exterior
holder 511 made of a resin and thermally insulated tank 512 held by
exterior holder 511. An integrally resin molded grip 520 is
provided in exterior holder 511. Thermally insulated tank 512 has
opening portion 513 which has a cylindrical shape with bottom and
opens upward.
[0185] Agitation cover 530 is attached to opening portion 513 so as
to be able to open and close opening portion 513. Agitation cover
530 is provided with a powder inlet 531 for introducing tea leaf
powders grated by milling unit 300 and a hot water supply inlet 532
through which hot water formed in apparatus main body 100 is poured
from hot water supply nozzle 170. Hot water supply inlet 532 is
provided at a position corresponding to supply port 171 of hot
water supply nozzle 170.
[0186] Powder inlet 531 and hot water supply inlet 532 communicate
with opening portion 513. Tea leaf powders introduced from moved
tea leaf powder tray 800 to powder inlet 531 are introduced into
thermally insulated tank 512 through opening portion 513. Hot water
poured through hot water supply inlet 532 from hot water supply
nozzle 170 is supplied into thermally insulated tank 512 through
opening portion 513.
[0187] Agitation blade 550 is placed on a bottom portion of
agitation tank 510. A rotation shaft 560 extending upward is
provided on the bottom portion of agitation tank 510, and a
cylindrical core 250 of agitation blade 550 is inserted in this
rotation shaft 560.
[0188] A permanent magnet 240 is embedded in agitation blade 550.
In agitation motor contactless table 140A, permanent magnet 240
embedded in agitation blade 550 and permanent magnet 141 provided
on a side of agitation motor unit 140 are magnetically coupled in a
contactless state, so that rotational driving force of agitation
motor unit 140 is transmitted to agitation blade 550. Details of
agitation blade 550 will be described later with reference to FIGS.
13 to 15.
[0189] Agitation tank 510 further includes a discharge portion 545
for discharging a prepared beverage. Discharge portion 545 is
provided in agitation tank 510 in a portion protruding from
apparatus main body 100. Discharge portion 545 includes a discharge
port 541 provided in the bottom portion of agitation tank 510 and
discharge port opening and closing mechanism 540 opening and
closing discharge port 541. Discharge port 541 is a portion for
discharging tea prepared by agitation of tea leaf powders and hot
water by agitation blade 550.
[0190] Discharge port opening and closing mechanism 540 includes an
opening and closing nozzle 543 inserted into discharge port 541 so
as to be able to open and close discharge port 541 and operation
lever 542 controlling a position of opening and closing nozzle 543.
Opening and closing nozzle 543 is biased to close discharge port
541 by a biasing member (not shown) such as a spring in a normal
state. When a user moves operation lever 542 against biasing force,
opening and closing nozzle 543 moves to open discharge port 541 and
thus tea in agitation tank 510 is poured into a cup (not shown)
placed on placement base 900.
[0191] (Structure of Agitation Blade 550)
[0192] A structure of agitation blade 550 in the present embodiment
will now be described with reference to FIGS. 13 to 15. FIG. 13 is
a perspective view showing a shape of agitation blade 550, FIG. 14
is an exploded perspective view showing a structure of agitation
blade 550, and FIG. 15 is a cross-sectional view along the line
XV-XV in FIG. 13.
[0193] Referring to FIGS. 13 and 14, agitation blade 550 includes
in the center, cylindrical core 250 in which a rotation shaft is
inserted. Cylindrical core 250 implements a rotation portion having
a central axis of rotation (C). Agitation blade 550 includes a
first paddle 210, a second paddle 211, and a blade portion 220. A
pair of first paddles 210 extends radially from an outer
circumferential surface of cylindrical core 250, the paddles being
provided at positions opposed to each other at an angle of 180
degrees. A pair of second paddles 211 is provided with the paddles
being provided at positions opposed to each other at an angle of
180 degrees, each at a position rotated by 90 degrees from first
paddle 210.
[0194] Blade portion 220 includes a plurality of blade pieces 221,
a lower auxiliary ring 222, and an upper auxiliary ring 223. Lower
auxiliary ring 222 is provided on an outer circumferential surface
of the pair of first paddles 210 and an outer circumferential
surface of the pair of second paddles 211. Lower auxiliary ring 222
has such a shape as not producing a resistance in a direction of
rotation (a direction shown with an arrow A in the figures).
[0195] A plurality of blade pieces 221 extending toward an upper
surface (a first surface) of first paddle 210 and second paddle 211
are provided on lower auxiliary ring 222 so as to surround central
axis of rotation C and to be in rotation symmetry with respect to
central axis of rotation C. An upper end portion of blade piece 221
is coupled to upper auxiliary ring 223. Upper auxiliary ring 223
also has a shape not producing a resistance in the direction of
rotation, similarly to lower auxiliary ring 222. A detailed shape
of blade piece 221 will be described later.
[0196] The pair of first paddles 210 has a curved paddle surface
212 formed, which has a prescribed thickness downward (toward a
second surface), has a curved shape recessed on a downstream side
when viewed in the direction of rotation, and contributes to
agitation in the direction of rotation (the direction shown with
arrow A in the figures). Similarly, second paddle 211 has curved
paddle surface 212 formed, which has a prescribed thickness
downward (toward the second surface), has a curved shape recessed
on the downstream side when viewed in the direction of rotation,
and contributes to agitation in the direction of rotation (the
direction shown with arrow A in the figures). Paddle surfaces 212
are provided at four locations, and four spaces 210h in total are
formed between first paddles 210 and second paddles 211. Permanent
magnet 240 is embedded in the pair of first paddles 210.
[0197] Cylindrical core 250 and the pair of first paddles 210
include an integrally formed cover 260a. A cylindrical
accommodation portion 210a for accommodating permanent magnet 240
is provided in a paddle main body 260b of first paddle 210.
Rotation is transmitted to permanent magnet 240 embedded in the
pair of first paddles 210, by a contactless rotational drive
mechanism (agitation motor unit 140 and permanent magnet 141) by
means of magnetic force. In order to enhance holding capability
owing to magnetic force during rotational drive, the permanent
magnet is desirably provided at two locations.
[0198] A through hole 253 in which the rotation shaft is inserted
is provided between the pair of first paddles 210. A conical cap
251 is accommodated in cylindrical core 250 for smooth rotation of
agitation blade 550 with a tip end of the rotation shaft being in
point contact. A ring seal 252 for ensuring water tightness is
fitted in between cover 260a and paddle main body 260b.
[0199] A shape of blade piece 221 will now be described with
reference to FIG. 15. An angle of inclination .theta. spreading
outward in an upward direction is provided in blade piece 221.
Angle of inclination .theta. is set, for example, to approximately
75 degrees. Depending on angle of inclination .theta., agitation
blade 550 can obtain high agitation force with an outer shape being
the same, or load imposed on the rotational drive portion can be
lowered with agitation force being the same.
[0200] Depending on angle of inclination .theta., ease in cleaning
of agitation blade 550 improves. An area where height ha of first
paddle 210 and second paddle 211 produces a resistance (contributes
to agitation force) in the direction of rotation as shown in FIG.
15 with respect to a total height h of agitation blade 550 is
defined. In the present embodiment, desirably, h=9.5 mm and ha=5.5
mm Blade piece 221 desirably has an inner diameter d1=.phi.30 mm
and an outer diameter d=.phi.32 mm. When agitation blade 550 having
such a dimension is employed, fine foams can be produced when a
depth of water is not smaller than 19 mm and not greater than 38 mm
from the bottom portion. When the depth of water is too small, a
swirl is not formed and it becomes difficult to take in air from
the liquid level through the swirl. When the depth of water is too
large, the swirl does not reach blade portion 220 and hence it
becomes difficult to produce fine foams.
[0201] As agitation blade 550 is rotated, as a result of an
agitation function of agitation blade 550, force in a direction
substantially orthogonal to central axis of rotation C is applied
to hot water. Consequently, a swirl is formed to reach agitation
blade 550. By sending air taken into hot water through the swirl
together with hot water from the central portion to the outer
circumferential portion of agitation blade 550, tea leaf powders
and hot water are agitated while foams are formed. The formed foams
are crushed as a result of collision with blade piece 221 and fine
foams are obtained.
[0202] Though an example in which agitation blade 550 constructed
as above is employed as the agitation member is described,
limitation thereto is not intended and an agitation member provided
with an agitation element in an outer circumferential portion can
be adopted as the agitation member as appropriate. A wound portion
formed from a wire in a toroidal shape or an impeller can be
adopted as the agitation element.
[0203] (Shape of Agitation Tank 510)
[0204] FIG. 16 is a perspective view showing the agitation tank and
the agitation blade according to the present embodiment. FIG. 17 is
a cross-sectional view along the line XVII-XVII shown in FIG. 16.
FIGS. 16 and 17 do not show exterior holder 511 for the sake of
convenience in showing agitation tank 510 and shows thermally
insulated tank 512 defining an inner circumferential surface 510a
of agitation tank 510. A shape of inner circumferential surface
510a of agitation tank 510 according to the present embodiment will
be described with reference to FIGS. 16 and 17.
[0205] As shown in FIGS. 16 and 17, inner circumferential surface
510a of agitation tank 510 according to the present embodiment is
defined by an inner surface of a side wall portion 515 of thermally
insulated tank 512. A bottom portion 514 of thermally insulated
tank 512 corresponds to the bottom portion of agitation tank 510.
Side wall portion 515 of thermally insulated tank 512 is provided
to connect to a circumference of bottom portion 514 of thermally
insulated tank 512.
[0206] Inner circumferential surface 510a of agitation tank 510 is
provided such that an area of opening continuously decreases from a
side of an upper end 515b of side wall portion 515 toward bottom
portion 514. Specifically, inner circumferential surface 510a of
agitation tank 510 is in a shape of a frustum.
[0207] As shown in FIG. 17, in a cross-section in the central
portion of agitation tank 510, an angle .theta. formed between side
wall portion 515 and bottom portion 514 (an angle formed between
AR2 and AR1 in the figure) is preferably greater than 90.degree.
and not greater than 119.degree.. An inner diameter .phi. A of
bottom portion 514 is preferably not smaller than 60 mm.
[0208] A virtual line S1 represents a water level position (a first
liquid level position) when hot water is supplied to agitation tank
510 based on a first guideline amount of supply at which the
guideline amount of supply described above is maximal and a virtual
line S2 represents a water level position (a second liquid level
position) when hot water is introduced into agitation tank 510
based on a second guideline amount of supply at which the guideline
amount of supply described above is minimal. An area of opening at
the first liquid level position is greater than an area of opening
at the second liquid level position.
[0209] Inner circumferential surface 510a of agitation tank 510 is
provided to be inclined as above, so that even when a small amount
of hot water is supplied, the liquid level position can be higher
than in a container with an area of opening of an opening surface
of the agitation tank substantially constant to the bottom
portion.
[0210] Thus, even when hot water is supplied based on the second
guideline amount of supply in order to prepare approximately half a
cup of tea less than a cup, the second liquid level position formed
thereby is located above upper surface 220a of blade portion 220 of
agitation blade 550. Consequently, since the entire blade portion
220 of agitation blade 550 contributing to agitation can be
immersed in hot water, hot water and powders can sufficiently be
agitated.
[0211] Since inner circumferential surface 510a of agitation tank
510 is inclined to radially spread toward an upward direction as
described above, displacement in height of a liquid level which
varies in accordance with an amount of supplied hot water can be
suppressed. Therefore, even when an amount of supply is greater
than a prescribed guideline amount of supply, displacement in
distance from a liquid level to agitation blade 550 can be
suppressed. A state of formed foams is affected by a distance from
the liquid level to agitation blade 550. By thus adjusting
displacement of the liquid level based on an amount of a liquid,
agitation force can sufficiently be ensured and air can
sufficiently be taken into hot water. Consequently, satisfactorily
fine foams can also be formed.
[0212] As set forth above, when agitation unit 500 and beverage
preparation apparatus 1 including the same according to the present
embodiment are made use of, a liquid can sufficiently be agitated
even though an amount of a supplied liquid is small. Agitation unit
500 and beverage preparation apparatus 1 including the same
according to the present embodiment can suppress displacement in
height of a liquid level which varies with increase in amount of a
supplied liquid. Namely, displacement of a liquid level can be
adjusted based on an amount of a liquid.
Embodiment 2
[0213] FIG. 18 is a perspective view showing an agitation tank and
the agitation blade according to the present embodiment. FIG. 19 is
a cross-sectional view along the line XIX-XIX shown in FIG. 18.
FIGS. 18 and 19 do not show exterior holder 511 either for the sake
of convenience in showing an agitation tank 510A and shows a
thermally insulated tank 512A defining inner circumferential
surface 510a of agitation tank 510A. A shape of inner
circumferential surface 510a of agitation tank 510A according to
the present embodiment will be described with reference to FIGS. 18
and 19.
[0214] Inner circumferential surface 510a of agitation tank 510A
according to the present embodiment has such a curved shape that an
area of opening decreases toward bottom portion 514. Specifically,
as shown in FIG. 19, in a vertical cross-sectional view with a
central axis C2 of agitation tank 510A being defined as the
vertical axis, inner circumferential surface 510a of agitation tank
510A has such a curved shape as curving to be recessed inward
relatively to a virtual line L1 connecting an upper end P1 and an
lower end P2 to each other. Since an angle formed between a lower
end portion of a side wall portion 515A and bottom portion 514 is
close to 90.degree., inner diameter .phi. A of bottom portion 514
can be made larger than in Embodiment 1.
[0215] In such a case as well, an area of opening at the first
liquid level position when hot water is supplied into agitation
tank 510A based on the first guideline amount of supply at which
the guideline amount of supply is maximal as shown with virtual
line S1 is greater than an area of opening at the second liquid
level position when hot water is introduced into agitation tank
510A based on the second guideline amount of supply at which the
guideline amount of supply is minimal as shown with virtual line
S2.
[0216] The second liquid level position is located above upper
surface 220a of blade portion 220 of agitation blade 550.
Therefore, the entire blade portion 220 can be immersed in a
minimal guideline amount of supplied hot water and hot water and
the tea leaf powders can sufficiently be agitated.
[0217] As set forth above, in the present embodiment as well, inner
circumferential surface 510a has such a curved shape that the area
of opening decreases toward bottom portion 514, so that a liquid
can sufficiently be agitated even when an amount of a supplied
liquid is small. Displacement in height of a liquid level which
varies with increase in amount of a supplied liquid can be
suppressed. Namely, displacement of a liquid level can be adjusted
based on an amount of a liquid.
[0218] Though an example in which inner circumferential surface
510a of agitation tank 510A has such a curved shape as curving to
be recessed inward relatively to virtual line L1 connecting upper
end P1 and lower end P2 to each other in the vertical
cross-sectional view with central axis C2 of agitation tank 510A
being defined as the vertical axis is described in the present
embodiment, limitation thereto is not intended and inner
circumferential surface 510a may have such a curved shape as
curving to project outward relatively to virtual line L1. In this
case, a beverage is less likely to spill when agitation ends and
the agitation unit containing a prepared beverage is carried, and
thus handleability is improved.
Embodiment 3
[0219] FIG. 20 is a perspective view showing an agitation tank and
the agitation blade according to the present embodiment. FIG. 21 is
a cross-sectional view along the line XXI-XXI shown in FIG. 20.
FIGS. 20 and 21 do not show exterior holder 511 either for the sake
of convenience in showing an agitation tank 510B and shows a
thermally insulated tank 512B defining inner circumferential
surface 510a of agitation tank 510B. Agitation tank 510B according
to the present embodiment will be described with reference to FIGS.
20 and 21.
[0220] Inner circumferential surface 510a of agitation tank 510B
according to the present embodiment is in a form of a staircase.
Thus, an area of opening of agitation tank 510B decreases stepwise
toward bottom portion 514. Specifically, an area of opening of
agitation tank 510B at a central position in a direction of height
(a direction of an axial line of central axis C2 of agitation tank
510B) of a third cylindrical portion 518 which will be described
later, an area of opening of agitation tank 510B at a central
position in the direction of height of a second cylindrical portion
517 which will be described later, and an area of opening of
agitation tank 510B at a central position in the direction of
height of a first cylindrical portion 516 which will be described
later become smaller stepwise in this order.
[0221] A side wall portion 515B of thermally insulated tank 512B
includes first cylindrical portion 516, second cylindrical portion
517, third cylindrical portion 518, a connection portion 571, and a
connection portion 574. First cylindrical portion 516 is in a
cylindrical shape and provided to connect to bottom portion 514.
Second cylindrical portion 517 is in a cylindrical shape and
connected to first cylindrical portion 516 with connection portion
571 being interposed. Second cylindrical portion 517 is greater in
inner diameter than first cylindrical portion 516. Third
cylindrical portion 518 is in a cylindrical shape and connected to
second cylindrical portion 517 with connection portion 574 being
interposed. Third cylindrical portion 518 is greater in inner
diameter than second cylindrical portion 517.
[0222] Connection portion 571 includes a curved portion 572 and a
flat portion 573. Curved portion 572 is connected to an upper end
of first cylindrical portion 516 and curved to be away from central
axis C2 in the upward direction. Flat portion 573 is in a shape of
an annular flat plate in parallel to the horizontal direction.
Second cylindrical portion 517 is provided to connect to an outer
circumference of flat portion 573.
[0223] Connection portion 574 includes a curved portion 575 and a
flat portion 576. Curved portion 575 is connected to an upper end
of second cylindrical portion 517 and curved to be away from
central axis C2 in the upward direction. Flat portion 576 is in a
shape of an annular flat plate in parallel to the horizontal
direction. Third cylindrical portion 518 is provided to connect to
an outer circumference of flat portion 576.
[0224] A length h1 from an inner surface of bottom portion 514 to
an inner surface of flat portion 573 along the direction of central
axis C2, a length h2 from the inner surface of flat portion 573 to
an inner surface of flat portion 576 along the direction of central
axis C2, and a length h3 from the inner surface of flat portion 576
to upper end 515b of third cylindrical portion 518 along the
direction of central axis C2 are substantially the same.
[0225] In such a case as well, the first liquid level position when
hot water is supplied into agitation tank 510B based on the first
guideline amount of supply at which the guideline amount of supply
is maximal is located above the second liquid level position when
hot water is introduced into agitation tank 510B based on the
second guideline amount of supply at which the guideline amount of
supply is minimal, and hence an area of opening at the first liquid
level position is greater than an area of opening at the second
liquid level position.
[0226] Specifically, as shown with virtual line S1, the first
liquid level position is located in the vicinity of a boundary
portion between second cylindrical portion 517 and third
cylindrical portion 518. The first liquid level position being
located in the vicinity of the boundary portion between second
cylindrical portion 517 and third cylindrical portion 518 refers to
the fact that the liquid level is located as high as a plane which
passes through the inner surface of flat portion 576 in the
horizontal direction or located at a position slightly lower than
the plane.
[0227] As shown with virtual line S2, the second liquid level
position is located at a prescribed position in first cylindrical
portion 516 above upper surface 220a of blade portion 220 of
agitation blade 550. Thus, the entire blade portion 220 can be
immersed in the minimum guideline amount of supplied hot water and
hot water and tea leaf powders can sufficiently be agitated.
[0228] The first liquid level position is located in the vicinity
of the boundary between second cylindrical portion 517 and third
cylindrical portion 518. Therefore, when water is introduced over
the guideline located at the highest position in introduction of
water into liquid storage tank 700 and hot water exceeding the
maximum guideline amount of supply is supplied into agitation tank
510B, hot water is supplied into third cylindrical portion 518 over
the upper end of second cylindrical portion 517. Since the area of
opening of third cylindrical portion 518 is larger than the area of
opening of second cylindrical portion 517, displacement in height
of the liquid level can be suppressed as compared with supply of
hot water only into second cylindrical portion 517.
[0229] As set forth above, in the present embodiment as well, inner
circumferential surface 510a of agitation tank 510B is in such a
form of a staircase that an area of opening decreases stepwise
toward bottom portion 514. Therefore, a liquid can sufficiently be
agitated even though an amount of a supplied liquid is small.
Displacement in height of a liquid level which varies with increase
in amount of a supplied liquid can be suppressed.
Embodiment 4
[0230] FIG. 22 is a perspective view showing an agitation tank and
the agitation blade according to the present embodiment. FIG. 23 is
a cross-sectional view along the line XXIII-XXIII shown in FIG. 22.
FIGS. 22 and 23 do not show exterior holder 511 either for the sake
of convenience in showing an agitation tank 510C and shows a
thermally insulated tank 512C defining the inner circumferential
surface of agitation tank 510C. Agitation tank 510C according to
the present embodiment will be described with reference to FIGS. 22
and 23.
[0231] Agitation tank 510C according to the present embodiment is
different from agitation tank 510B according to Embodiment 3 in a
shape of inner circumferential surface 510a of agitation tank 510C
originating from a difference in shape of a side wall portion 515C
of thermally insulated tank 512C.
[0232] Specifically, a connection portion 571C connecting first
cylindrical portion 516 and second cylindrical portion 517 to each
other and a connection portion 574C connecting second cylindrical
portion 517 and third cylindrical portion 518 to each other have
inclined portions 573C and 576C inclined to radially spread toward
the upward direction, instead of flat portions 573 and 576
according to Embodiment 3, respectively. Inclined portions 573C and
576C have inclination start points P3 and P4 at the boundary with
curved portions 572 and 575, respectively.
[0233] Length h1 from the inner surface of bottom portion 514 to
inclination start point P3 along the direction of central axis C2,
length h2 from inclination start point P3 to inclination start
point P4 along the direction of central axis C2, and length h3 from
inclination start point P3 to upper end 515b of third cylindrical
portion 518 along the direction of central axis C2 are
substantially the same.
[0234] With such a construction as well, an area of opening of
agitation tank 510C decreases stepwise toward bottom portion 514.
Specifically, an area of opening of agitation tank 510C at a
central position in the direction of height (the direction of the
axial line of central axis C2 of agitation tank 510C) of third
cylindrical portion 518, an area of opening of agitation tank 510C
at a central position in the direction of height of second
cylindrical portion 517, and an area of opening of agitation tank
510C at a central position in the direction of height of first
cylindrical portion 516 become smaller stepwise in this order.
[0235] In this case, preferably, the first liquid level position is
located in the vicinity of inclination start point P4 as shown with
virtual line S1 and the second liquid level position is located at
a prescribed position in first cylindrical portion 516 as shown
with virtual line S2. With such a construction, agitation tank 510C
according to the present embodiment obtains an effect substantially
the same as the effect of agitation tank 510B according to
Embodiment 3. In addition, by providing inclined portions 573C and
576C, an effect of a smoother flow of a liquid in discharging of a
beverage than in the construction according to Embodiment 3 is
obtained.
Embodiment 5
[0236] FIG. 24 is a perspective view showing an agitation tank and
the agitation blade according to the present embodiment. FIG. 25 is
a cross-sectional view along the line XXV-XXV shown in FIG. 24.
FIGS. 24 and 25 do not show exterior holder 511 either for the sake
of convenience in showing an agitation tank 510D. Agitation tank
510D according to the present embodiment will be described with
reference to FIGS. 24 and 25.
[0237] Agitation tank 510D according to the present embodiment is
different from agitation tank 510C according to Embodiment 4 in a
shape of inner circumferential surface 510a of agitation tank 510D
originating from a difference in shape of a side wall portion 515D
of a thermally insulated tank 512D.
[0238] Specifically, first cylindrical portion 516, second
cylindrical portion 517, and third cylindrical portion 518 are
different in height from one another depending on an amount of a
supplied hot water (an amount for one serving, an amount for two
servings, and an amount for three servings).
[0239] Specifically, length h1 from the inner surface of bottom
portion 514 to inclination start point P3 along the direction of
central axis C2 is longer than length h2 from inclination start
point P3 to inclination start point P4 along the direction of
central axis C2 and length h3 from inclination start point P3 to
upper end 515b of third cylindrical portion 518 along the direction
of central axis C2. Length h2 from inclination start point P3 to
inclination start point P4 along the direction of central axis C2
is longer than length h3 from inclination start point P3 to upper
end 515b of third cylindrical portion 518 along the direction of
central axis C2.
[0240] As shown with virtual line S2, the liquid level position
(the second liquid level position) when hot water in an amount of
approximately half a cup which is the minimum guideline amount of
supply is supplied is located at a height position substantially
half the height of first cylindrical portion 516. The liquid level
position when hot water for one serving is supplied is located in
the vicinity of inclination start point P3. The liquid level
position when hot water for two servings is supplied is located in
the vicinity of inclination start point P4. As shown with virtual
line S1, the liquid level position (the first liquid level
position) when hot water for three servings which is the maximum
guideline amount of supply is supplied is located in the vicinity
of the upper end of third cylindrical portion 518.
[0241] With such a construction, agitation tank 510D according to
the present embodiment obtains an effect substantially the same as
the effect of agitation tank 510C according to Embodiment 4. Since
a step portion (connection portions 571C and 574C) of inner
circumferential surface 510a functions as a scale in agitation tank
510D according to the present embodiment, a user can readily check
an amount of supply of hot water and convenience is improved.
Embodiment 6
[0242] FIG. 26 is a perspective view showing an agitation tank and
the agitation blade according to the present embodiment. FIG. 27 is
a cross-sectional view along the line XXVII-XXVII shown in FIG. 26.
FIGS. 26 and 27 do not show exterior holder 511 either for the sake
of convenience in showing an agitation tank 510E but shows a
thermally insulated tank 512E defining inner circumferential
surface 510a of agitation tank 510E. Agitation tank 510E according
to the present embodiment will be described with reference to FIGS.
26 and 27.
[0243] Agitation tank 510E according to the present embodiment is
different from agitation tank 510B according to Embodiment 3 in a
shape of inner circumferential surface 510a of agitation tank 510E
originating from a difference in shape of a side wall portion 515E
of thermally insulated tank 512E.
[0244] Specifically, inner circumferential surface 510a of
agitation tank 510 has a helically extending surface 510c.
Helically extending surface 510c is provided to turnaround central
axis C2 while it has a constant width along the direction of
central axis C2 of agitation tank 510. Helically extending surface
510c is provided such that a distance in a radial direction from
central axis C2 of agitation tank 510E increases in the upward
direction. The direction of turning of helically extending surface
510c is preferably the same as the direction of rotation of
agitation blade 550 so that a flow of a liquid during agitation can
be stronger.
[0245] With such a construction as well, an area of opening of
agitation tank 510E can decrease toward bottom portion 514. Thus,
an area of opening at the first liquid level position when hot
water is supplied into agitation tank 510E based on the first
guideline amount of supply at which the guideline amount of supply
is maximal as shown with virtual line S1 is greater than an area of
opening at the second liquid level position when hot water is
introduced in agitation tank 510E based on the second guideline
amount of supply at which the guideline amount of supply is minimal
as shown with virtual line S2.
[0246] The second liquid level position is located above upper
surface 220a of blade portion 220 of agitation blade 550. Thus, the
entire blade portion 220 can be immersed in the minimum guideline
amount of a supplied liquid and the liquid and powders can
sufficiently be agitated.
[0247] As set forth above, in agitation tank 510E according to the
present embodiment as well, with inner circumferential surface 510a
in a form of a helically extending surface, a liquid can
sufficiently be agitated even though an amount of a supplied liquid
is small. Displacement in height of a liquid level which varies
with increase in amount of a supplied liquid can be suppressed.
With inner circumferential surface 510a in a form of the helically
extending surface, an effect of a smoother flow of a liquid in
discharging of a beverage than in agitation tank 510B according to
Embodiment 3 is obtained.
Embodiment 7
[0248] FIG. 28 is a perspective view showing an agitation tank and
the agitation blade according to the present embodiment. FIG. 29 is
a cross-sectional view along the line XXIX-XXIX shown in FIG. 28.
FIGS. 28 and 29 do not show exterior holder 511 either for the sake
of convenience in showing an agitation tank 510F. Agitation tank
510F according to the present embodiment will be described with
reference to FIGS. 28 and 29.
[0249] Agitation tank 510F according to the present embodiment is
different from agitation tank 510B according to Embodiment 3 in a
shape of inner circumferential surface 510a of agitation tank 510F
originating from a difference in shape of a side wall portion 515F
of a thermally insulated tank 512F. More specifically, the number
of steps provided in inner circumferential surface 510a is
different.
[0250] Side wall portion 515F of thermally insulated tank 512F
includes first cylindrical portion 516, second cylindrical portion
517, and a connection portion 571F. First cylindrical portion 516
is in a cylindrical shape and provided to connect to bottom portion
514. Second cylindrical portion 517 is in a cylindrical shape and
connected to first cylindrical portion 516 with connection portion
571F being interposed. An inner diameter .phi. B of second
cylindrical portion 517 is greater than inner diameter (inner
diameter of bottom portion 514) .phi. A of first cylindrical
portion 516. For example, inner diameter A of first cylindrical
portion 516 is preferably approximately 70 mm and in this case,
inner diameter .phi. B of the second cylindrical portion is
preferably not smaller than 124 mm.
[0251] Connection portion 571F is in a shape of an annular flat
plate in parallel to the horizontal direction. Connection portion
571F connects the upper end of first cylindrical portion 516 and a
lower end of second cylindrical portion 517 to each other.
[0252] With such a construction as well, an area of opening of
agitation tank 510F decreases stepwise toward bottom portion 514.
Specifically, an area of opening of agitation tank 510F at a
central position in the direction of height of second cylindrical
portion 517 and an area of opening of agitation tank 510F at a
central position in the direction of height of first cylindrical
portion 516 become smaller stepwise in this order.
[0253] In this case, the first liquid level position is located in
the center in the direction of height of second cylindrical portion
517 as shown with virtual line S1 and the second liquid level
position is located in the vicinity of the boundary portion between
first cylindrical portion 516 and second cylindrical portion 517 as
shown with virtual line S2.
[0254] The second liquid level position is located above upper
surface 220a of blade portion 220 of agitation blade 550. Thus,
blade portion 220 can entirely be immersed in the minimum guideline
amount of supplied hot water and hot water and tea leaf powders can
sufficiently be agitated.
[0255] With a construction as above, agitation tank 510F according
to the present embodiment obtains an effect substantially the same
as the effect of agitation tank 510B according to Embodiment 3.
[0256] In the present embodiment, with decrease in inner diameter
of bottom portion 514, even when an amount of a liquid supplied to
agitation tank 510F is small, a distance from agitation blade 550
to the second liquid level position can be made larger.
Furthermore, by setting an inner diameter of second cylindrical
portion 517 to be greater than an inner diameter of first
cylindrical portion 516, a distance from agitation blade 550 to the
first liquid level position can be made smaller when an amount of a
supplied liquid is large.
[0257] Thus, fine foams can be produced in each case by forming a
swirl of air by taking air from the liquid level with rotation of
agitation blade 550 and cutting the air with blade portion 220 of
agitation blade 550. Therefore, in the present embodiment, a range
of amounts of a liquid which can be agitated and frothed can also
be widened.
Embodiment 8
[0258] FIG. 30 is a perspective view showing an agitation tank and
the agitation blade according to the present embodiment. FIG. 31 is
a cross-sectional view along the line XXXI-XXXI shown in FIG. 30.
FIGS. 30 and 31 do not show exterior holder 511 either for the sake
of convenience in showing an agitation tank 510G. Agitation tank
510G according to the present embodiment will be described with
reference to FIGS. 30 and 31.
[0259] Agitation tank 510G according to the present embodiment is
different from agitation tank 510F according to Embodiment 7 in a
shape of inner circumferential surface 510a of agitation tank 510G
originating from a difference in shape of a side wall portion 515G
of a thermally insulated tank 512G. Specifically, a shape of a
connection portion 571G is different.
[0260] Connection portion 571G is in such a bowl shape as having
open opposing ends in a vertical direction. Connection portion 571G
is provided to have an area of opening gradually decreasing
downward. A lower end side of connection portion 571G is connected
to the upper end of first cylindrical portion 516. An upper end
side of connection portion 571G is connected to a lower end side of
second cylindrical portion 517.
[0261] In such a case as well, an area of opening at the first
liquid level position when hot water is supplied into agitation
tank 510G based on the first guideline amount of supply at which
the guideline amount of supply is maximal as shown with virtual
line S1 is greater than an area of opening at the second liquid
level position when hot water is introduced into agitation tank
510G based on the second guideline amount of supply at which the
guideline amount of supply is minimal as shown with virtual line
S2.
[0262] The second liquid level position is located above upper
surface 220a of blade portion 220 of agitation blade 550. Thus,
blade portion 220 can entirely be immersed in the minimum guideline
amount of supplied hot water and hot water and tea leaf powders can
sufficiently be agitated.
[0263] Furthermore, with decrease in inner diameter of bottom
portion 514, even when an amount of a liquid supplied to agitation
tank 510G is small, a distance from agitation blade 550 to the
second liquid level position can be large. With a most part of
connection portion 571G being greater than the inner diameter of
first cylindrical portion 516, a distance from agitation blade 550
to the first liquid level position can be made smaller when an
amount of a supplied liquid is large. Thus, a range of amounts of a
liquid which can be agitated and frothed can also be widened.
[0264] As set forth above, agitation tank 510G according to the
present embodiment obtains an effect substantially the same as the
effect of agitation tank 510F according to Embodiment 7. In
addition, with connection portion 571G in a bowl shape, agitation
tank 510G according to the present embodiment can suppress
resistance of water produced by a step portion and obtains an
effect of a smooth flow of a liquid in discharging of a
beverage.
Embodiment 9
[0265] FIG. 32 is a perspective view showing an agitation tank and
the agitation blade according to the present embodiment. FIG. 33 is
a cross-sectional view along the line XXXIII-XXXIII shown in FIG.
32. FIGS. 32 and 33 do not show exterior holder 511 either for the
sake of convenience in showing an agitation tank 510H. Agitation
tank 510H according to the present embodiment will be described
with reference to FIGS. 32 and 33.
[0266] Agitation tank 510H according to the present embodiment is
different from agitation tank 510G according to Embodiment 8 in a
shape of inner circumferential surface 510a of agitation tank 510H
originating from a difference in a shape of a side wall portion
515H of a thermally insulated tank 512H.
[0267] Side wall portion 515H of thermally insulated tank 512H
includes first cylindrical portion 516 and a second cylindrical
portion 517H. First cylindrical portion 516 is in a cylindrical
shape of which length around the circumference is constant along
the vertical direction. Second cylindrical portion 517H is in a
cylindrical shape of which length around the circumference
gradually decreases downward. Thus, second cylindrical portion 517H
has an area of opening gradually decreasing downward. A lower end
of second cylindrical portion 517H is connected to the upper end of
first cylindrical portion 516.
[0268] In such a case as well, an area of opening at the first
liquid level position when hot water is supplied into agitation
tank 510H based on the first guideline amount of supply at which
the guideline amount of supply is maximal as shown with virtual
line S1 is greater than an area of opening at the second liquid
level position when hot water is introduced into agitation tank
510H based on the second guideline amount of supply at which the
guideline amount of supply is minimal as shown with virtual line
S2.
[0269] The second liquid level position is located above upper
surface 220a of blade portion 220 of agitation blade 550. Thus,
blade portion 220 can entirely be immersed in the minimum guideline
amount of supplied hot water and hot water and tea leaf powders can
sufficiently be agitated.
[0270] With a most part of second cylindrical portion 517H being
greater than the inner diameter of first cylindrical portion 516, a
range of amounts of a liquid which can be agitated and frothed can
also be widened as described above.
[0271] In addition, with second cylindrical portion 517H in a shape
as above, resistance of water produced by a step portion can be
suppressed and an effect of a smooth flow of a liquid in
discharging of a beverage is also obtained.
[0272] As set forth above, agitation tank 510H according to the
present embodiment obtains an effect substantially the same as the
effect of agitation tank 510G according to Embodiment 8.
[0273] (Comparative Form)
[0274] FIG. 34 is a perspective view showing an agitation tank and
the agitation blade in a comparative form. FIG. 35 is a
cross-sectional view along the line XXXV-XXXV shown in FIG. 34.
FIGS. 34 and 35 do not show exterior holder 511 either for the sake
of convenience in showing an agitation tank 510X. Agitation tank
510X according to the comparative form will be described with
reference to FIGS. 34 and 35.
[0275] Agitation tank 510X according to the comparative form is
different from agitation tank 510F according to Embodiment 7 in a
shape of inner circumferential surface 510a of agitation tank 510X
originating from a difference in shape of a side wall portion 515X
of a thermally insulated tank 512X.
[0276] Side wall portion 515X of thermally insulated tank 512X is
in a cylindrical shape of which length around the circumference is
constant along the vertical direction. Therefore, side wall portion
515X has an area of opening constant along the vertical direction.
An inner diameter (an inner diameter of bottom portion 514) .phi. A
of side wall portion 515X is greater than an inner diameter of
bottom portion 514 of each of agitation tanks 510 to 510H according
to Embodiments 1 to 9.
[0277] Agitation blade 550 produces fine foams by forming a swirl
by rotation and cutting air taken from the swirl with blade portion
220. When hot water is supplied into agitation tank 510X and when a
depth of water (a depth of a liquid) is too small, a swirl cannot
be formed and air cannot be taken into hot water during agitation.
Therefore, in order to produce fine foams, the liquid level should
be located moderately above agitation blade 550.
[0278] As described above, in agitation tank 510X according to the
comparative form, an inner diameter of bottom portion 514 is
greater than in Embodiments 1 to 9. Therefore, the minimum
guideline amount of supply necessary for the liquid level to be
located above the agitation blade is greater than the minimum
guideline amount of supply according to Embodiments 1 to 9.
Therefore, in agitation tank 510X according to the comparative
form, when an amount of a supplied liquid is small, the liquid
cannot sufficiently be agitated.
Examples
Verification Experiment
[0279] FIG. 36 is a diagram showing conditions and results of a
verification experiment conducted for confirming an effect of the
present invention. A verification experiment conducted for
confirming the effect of the present invention will be described
with reference to FIG. 36.
[0280] In the verification experiment, an agitation unit including
agitation tank 510X according to the comparative form was employed
as Comparative Example 1, agitation unit 500 including agitation
tank 510 according to Embodiment 1 was employed as Example 1, and
agitation tank 510F according to Embodiment 7 was employed as
Example 2. In Comparative Example 1, an inner diameter (an inner
diameter of the bottom portion) .phi. A of side wall portion 515X
was set to 100 mm and side wall portion 515X was erected at angle
of 90.degree. with respect to the bottom portion. In Example 1, an
inner diameter .phi. A of the bottom portion was set to 60 mm and
an angle formed between side wall portion 515 and bottom portion
514 was set to 119.degree.. In Example 2, an inner diameter (an
inner diameter of the bottom portion) .phi. A of first cylindrical
portion 516 was set to 70 mm and an inner diameter .phi. B of
second cylindrical portion 517 was set to 124 mm.
[0281] An agitation blade which can produce fine foams when a depth
of water was not smaller than 19 mm and not greater than 38 mm was
employed as agitation blade 550.
[0282] In Examples 1 and 2 and Comparative Example 1, an amount of
water supplied to each agitation tank when the depth of water was
set to 19 mm and 38 mm was measured. An amount of supply necessary
at the time when the depth of water was set to 19 mm was defined as
the minimum guideline amount of supply. An amount of supply
necessary at the time when the depth of water was set to 38 mm was
defined as the maximum guideline amount of supply.
[0283] In Comparative Example 1, the minimum guideline amount of
supply was 150 cc and the maximum guideline amount of supply was
300 cc. In Examples 1 and 2, the minimum guideline amount of supply
was 75 cc, which was approximately half that in Comparative Example
1. In Example 2, the maximum guideline amount was 450 cc. With the
shape in Example 2, the maximum supply amount could be increased by
setting the inner diameter of second cylindrical portion 517 to be
greater than in Comparative Example 1.
[0284] It was also experimentally proven that a liquid could
sufficiently be agitated even when an amount of a supplied liquid
was small, by employing the agitation unit including the agitation
tank in a shape as in Examples 1 and 2.
[0285] Though an example in which beverage preparation apparatus 1
includes agitation unit 500 including agitation tank 510 according
to Embodiment 1 is illustrated and described in Embodiment 1 above,
limitation thereto is not intended and the beverage preparation
apparatus may include an agitation unit including any of agitation
tanks 510A to 510H according to Embodiments 2 to 9.
[0286] Though an example in which an agitation tank is constituted
of an exterior holder and a thermally insulated tank is illustrated
and described in Embodiments 1 to 9 above, limitation thereto is
not intended and the agitation tank may consist of a thermally
insulated tank. A container not having thermal insulation but
having heat resistance may be employed instead of the thermally
insulated tank.
[0287] Though an example in which tea as a beverage is prepared by
agitating hot water as a liquid and tea leaf powders as powders in
the agitation unit according to each of Embodiments 1 to 9 above is
illustrated and described, limitation thereto is not intended. A
foamed beverage such as milk foam may be prepared by agitating a
liquid for a beverage such as milk alone, or a mixed beverage
obtained by agitating a plurality of liquids for a beverage
different in specific gravity may be prepared.
Embodiment 10
Beverage Preparation Apparatus 1001
[0288] A beverage preparation apparatus 1001 in the present
embodiment will be described with reference to FIGS. 37 to 40. FIG.
37 is an overall perspective view of beverage preparation apparatus
1001, FIG. 38 is a cross-sectional view along the line II-II in
FIG. 37, and FIG. 39 is an overall perspective view of a schematic
component of beverage preparation apparatus 1001. FIG. 40 is a
block diagram showing a construction of the beverage preparation
apparatus.
[0289] As shown in FIGS. 37 to 39, beverage preparation apparatus
1001 uses tea leaves as an object to be grated and obtains tea leaf
powders by grating the tea leaves. The beverage preparation
apparatus uses the obtained tea leaf powders for preparing tea as a
beverage. Beverage preparation apparatus 1001 includes an apparatus
main body 1100 as a main body portion, a milling unit 1300, an
agitation unit 1500, a liquid storage tank 1700, a liquid supply
path 1155 (see FIG. 38), a tea leaf powder tray 1800 as a powder
reception portion, and a placement base 1900. Placement base 1900
is provided to protrude forward on a front side in a lower portion
of apparatus main body 1100 and a cup (not shown) and tea leaf
powder tray 1800 can be placed thereon. Tea leaf powder tray 1800
is provided such that a user can move the tray by holding the
tray.
[0290] (Milling Unit 1300)
[0291] Milling unit 1300 is removably attached to a milling unit
attachment portion 1180 provided on a front surface side of
apparatus main body 1100. Milling unit 1300 is arranged at a
distance from an agitation tank 1510 so as to be displaced from
agitation tank 1510 below agitation tank 1510 included in agitation
unit 1500 when viewed from the front.
[0292] Milling driving force coupling mechanism 1130 is provided in
milling unit attachment portion 1180 so as to protrude forward and
milling unit 1300 is removably attached to milling driving force
coupling mechanism 1130. Milling unit 1300 obtains driving force
for milling tea leaves representing an object to be grated by being
coupled to milling driving force coupling mechanism 1130.
[0293] Tea leaves introduced from an upper portion of milling unit
1300 into milling unit 1300 are finely grated in milling unit 1300.
The grated tea leaves are dropped and collected as tea leaf powders
on tea leaf powder tray 1800 placed below milling unit 1300. A
detailed structure of milling unit 1300 will be described later
with reference to FIGS. 45 to 47.
[0294] (Liquid Storage Tank 1700)
[0295] Liquid storage tank 1700 is removably attached to a liquid
storage tank attachment portion 1195 provided on an upper surface
side of apparatus main body 1100. Liquid storage tank 1700 includes
a tank main body 1710 having an opening in an upper surface and a
lid portion 1720 closing the opening in the upper surface of tank
main body 1710. Liquid storage tank 1700 stores such a liquid as
water which is introduced from the outside by removing lid portion
1720.
[0296] (Liquid Supply Path 1155)
[0297] Liquid supply path 1155 is accommodated in apparatus main
body 1100. Liquid supply path 1155 is connected to liquid storage
tank 1700 (see FIG. 44). Liquid supply path 1155 is provided with a
supply port 1171 on a side opposite to a side where liquid storage
tank 1700 is connected. Liquid supply path 1155 includes a hot
water supply pipe 1150 and a hot water supply nozzle 1170. Hot
water supply pipe 1150 has one end side connected to liquid storage
tank 1700 and the other end side connected to hot water supply
nozzle 1170. A liquid introduced from liquid storage tank 1700 into
liquid supply path 1155 is supplied to agitation unit 1500 through
hot water supply pipe 1150 and hot water supply nozzle 1170.
[0298] (Agitation Unit 1500)
[0299] Agitation unit 1500 includes an agitation blade 1550 for
agitating a liquid (including a liquid mixture in which a liquid
and powders have been mixed) and agitation tank 1510 accommodating
agitation blade 1550. Agitation blade 1550 corresponds to an
agitation member. Agitation tank 1510 is removably attached to an
agitation tank attachment portion 1190 provided on the front
surface side of apparatus main body 1100. Agitation tank 1510 is
attached to agitation tank attachment portion 1190 so as to
protrude from apparatus main body 1100 in a direction intersecting
with a vertical direction. Specifically, agitation tank 1510 is
attached such that a part of agitation tank 1510 protrudes from a
front surface of apparatus main body 1100 along a direction of
normal to the front surface.
[0300] An agitation motor contactless table 1140A is provided in
agitation tank attachment portion 1190. Agitation unit 1500 is
placed on agitation motor contactless table 1140A. Agitation blade
1550 provided in agitation unit 1500 is rotated by an agitation
motor unit 1140 and a permanent magnet 1141 coupled thereto.
Agitation motor unit 1140 and permanent magnet 1141 are
accommodated in apparatus main body 1100 so as to be located below
agitation motor contactless table 1140A. Agitation motor unit 1140
corresponds to an agitation member drive portion which rotationally
drives agitation blade 1550.
[0301] Hot water supply nozzle 1170 is provided above agitation
tank attachment portion 1190 of apparatus main body 1100. In
apparatus main body 1100, a temperature of water in hot water
supply pipe 1150 is raised to a prescribed temperature and hot
water is supplied from hot water supply nozzle 1170 into agitation
tank 1510. Hot water prepared in apparatus main body 1100 and tea
leaf powders obtained by milling unit 1300 are introduced into
agitation tank 1510, and hot water and tea leaf powders are
agitated by agitation blade 1550 in agitation tank 1510. Tea as a
liquid mixture is thus prepared in agitation tank 1510.
[0302] Tea prepared in agitation unit 1500 can be poured into a cup
(not shown) placed on placement base 1900 by operating an operation
lever 1542 of a discharge mechanism 1540 provided below agitation
tank 1510. A detailed structure of agitation unit 1500 will be
described later with reference to FIGS. 48 and 49.
[0303] As shown in FIG. 40, beverage preparation apparatus 1001
further includes a control unit 1110, a milling motor unit 1120, an
agitation motor unit 1140, a heater 1160, an input portion 1112,
and a sensing device 1115. Control unit 1110 controls an operation
of milling motor unit 1120, agitation motor unit 1140, and heater
1160. Milling motor unit 1120 drives milling unit 1300 and
agitation motor unit 1140 drives agitation unit 1500.
[0304] Specifically, milling motor unit 1120 rotationally drives a
lower mill 1350 (see FIG. 46) of milling unit 1300 to thereby grate
tea leaves between an upper mill 1360 (see FIG. 46) and lower mill
1350. Agitation motor unit 1140 rotationally drives agitation blade
1550 of agitation unit 1500 to thereby agitate hot water and tea
leaf powders supplied to agitation tank 1510.
[0305] Input portion 1112 serves to instruct control unit 1110 to
set a rotation mode of agitation blade 1550 and a time period for
agitation and/or the number of agitations of agitation blade 1550
in a discharging step which will be described later. A push button
or a liquid crystal display integrated with a touch sensor can be
adopted as input portion 1112. When the push button implements
input portion 1112, such conditions as a rotation mode, a time
period for agitation, and/or the number of agitations can be
determined by making selection as appropriate from among a
plurality of buttons such as a first button and a second button for
which predetermined different conditions have been set. When a
liquid crystal display integrated with a touch sensor implements
input portion 1112, a user may directly input such a condition.
[0306] The sensing device 1115 senses timing of an operation of
operation lever 1542 provided in discharge mechanism 1540 which
will be described later. The sensing device 1115 inputs a sensing
signal indicative of sensing of the timing to control unit 1110.
Control unit 1110 controls agitation motor unit 1140 in advance
such that agitation blade 1550 is rotationally driven before the
sensing device 1115 senses the timing and controls agitation motor
unit 1140 such that agitation blade 1550 is rotationally driven in
a signal input state that the sensing signal has been input.
[0307] A liquid such as water stored in liquid storage tank 1700 is
introduced into liquid supply path 1155. Water introduced into
liquid supply path 1155 is heated by heater 1160 and resultant hot
water is supplied to agitation unit 1500.
[0308] (Flow of Preparation of Tea (Beverage))
[0309] A flow of preparation of tea (beverage) with the use of
beverage preparation apparatus 1001 will now be described with
reference to FIGS. 41 to 43. FIGS. 41 to 43 show first to third
preparation flows for preparing tea using beverage preparation
apparatus 1001, respectively. A prescribed amount of tea leaves is
introduced into milling unit 1300 and a prescribed amount of water
is stored in liquid storage tank 1700.
[0310] (First Preparation Flow)
[0311] A first preparation flow will be described with reference to
FIG. 41. This first preparation flow is a flow in which grating of
tea leaves in milling unit 1300 and supply of hot water from
apparatus main body 1100 to agitation unit 1500 are simultaneously
carried out.
[0312] In beverage preparation apparatus 1001, milling of tea
leaves by milling unit 1300 in a step 111 and supply of hot water
from apparatus main body 1100 to agitation unit 1500 in a step 113
are simultaneously started. Then, milling of tea leaves by milling
unit 1300 ends in a step 112, and supply of hot water from
apparatus main body 1100 to agitation unit 1500 ends in a step
114.
[0313] In a step 115, tea leaf powders obtained in step 112 are
introduced into agitation unit 1500 by a user.
[0314] Then, in a step 116, agitation of the tea leaf powders and
hot water in agitation unit 1500 is started. In a step 117,
agitation of the tea leaf powders and hot water in agitation unit
1500 ends. In a step 118, tea is discharged into the cup placed on
placement base 1900 as the user operates operation lever 1542 of
discharge mechanism 1540 provided below agitation unit 1500.
[0315] (Second Preparation Flow)
[0316] A second preparation flow will be described with reference
to FIG. 42. This second preparation flow is a flow in which hot
water is supplied from apparatus main body 1100 to agitation unit
1500 after tea leaves are grated in milling unit 1300.
[0317] In beverage preparation apparatus 1001, in a step 121,
milling of tea leaves by milling unit 1300 is started. In a step
122, milling of tea leaves by milling unit 1300 ends. In a step
123, tea leaf powders obtained in step 122 are introduced into
agitation unit 1500 by a user.
[0318] In a step 124, supply of hot water from apparatus main body
1100 to agitation unit 1500 is started. In a step 125, supply of
hot water from apparatus main body 1100 to agitation unit 1500
ends.
[0319] Then, in a step 126, agitation of the tea leaf powders and
hot water in agitation unit 1500 is started. In a step 127,
agitation of the tea leaf powders and hot water in agitation unit
1500 ends. In a step 128, tea is discharged into the cup placed on
placement base 1900 as the user operates operation lever 1542 of
discharge mechanism 1540 provided below agitation unit 1500.
[0320] (Third Preparation Flow)
[0321] A third preparation flow will be described with reference to
FIG. 43. This third preparation flow includes a step of cooling hot
water by agitation in agitation unit 1500.
[0322] In beverage preparation apparatus 1001, milling of tea
leaves by milling unit 1300 in a step 131 and supply of hot water
from apparatus main body 1100 to agitation unit 1500 in a step 133
are simultaneously started. In a step 134, supply of hot water from
apparatus main body 1100 to agitation unit 1500 ends.
[0323] Then, in a step 132, milling of tea leaves by milling unit
1300 ends, and in a step 135, cooling by agitation of hot water
supply is started in agitation unit 1500. In a step 136, cooling by
agitation of hot water supply in agitation unit 1500 ends.
[0324] In a step 137, the tea leaf powders obtained in step 132 are
introduced into agitation unit 1500 by a user.
[0325] Then, in a step 138, agitation of the tea leaf powders and
hot water in agitation unit 1500 is started. In a step 139,
agitation of the tea leaf powders and hot water in agitation unit
1500 ends. In a step 140, tea is discharged into the cup placed on
placement base 1900 as the user operates operation lever 1542 of
discharge mechanism 1540 provided below agitation unit 1500.
[0326] (Internal Structure of Apparatus Main Body 1100)
[0327] An internal structure of apparatus main body 1100 will now
be described with reference to FIG. 44. FIG. 44 is a perspective
view showing the internal structure of beverage preparation
apparatus 1001. In apparatus main body 1100 of beverage preparation
apparatus 1001, control unit 1110 including a printed circuit board
on which electronic components are mounted is arranged on a front
surface side of liquid storage tank 1700. Based on input of a start
signal by a user, the flow for preparation of tea is executed by
control unit 1110.
[0328] A milling motor unit 1120 for providing driving force to
milling unit 1300 is arranged at a position below control unit
1110. Milling driving force coupling mechanism 1130 provided to
protrude forward for transmitting driving force of milling motor
unit 1120 to milling unit 1300 is provided at a position below
milling motor unit 1120.
[0329] To a bottom surface of liquid storage tank 1700, one end of
hot water supply pipe 1150 extending once downward from the bottom
surface and then extending upward in a U shape is coupled. Hot
water supply nozzle 1170 for pouring hot water into agitation tank
1510 of agitation unit 1500 is coupled to an upper end portion of
hot water supply pipe 1150. A U-shaped heater 1160 for heating
water which passes through hot water supply pipe 1150 is attached
to an intermediate region of hot water supply pipe 1150.
[0330] (Structure of Milling Unit 1300)
[0331] A structure of milling unit 1300 will now be described with
reference to FIGS. 45 to 47. FIG. 45 is a perspective view of
milling unit 1300, FIG. 46 is an exploded perspective view of
milling unit 1300, and FIG. 47 is a vertical cross-sectional view
of milling unit 1300.
[0332] Milling unit 1300 has a milling case 1310 having a
cylindrical shape as a whole, and a window for coupling 1300W in
which milling driving force coupling mechanism 1130 is inserted is
provided in a side surface below. A storage portion 1311 (see FIG.
47) for storing tea leaf powders produced by upper mill 1360 and
lower mill 1350 and a discharge path 1312 communicating with
storage portion 1311 are provided. An outlet port 1312a for
discharging tea leaf powders into tea leaf powder tray 1800 is
provided at a lower end portion of discharge path 1312 which is a
lowermost end portion of milling case 1310. Outlet port 1312a is
provided below an opening portion 1513 of a thermally insulated
tank 1512 (see FIG. 48) which will be described later. Entry
through outlet port 1312a, of steam resulting from hot water
supplied into thermally insulated tank 1512 can thus be
prevented.
[0333] Milling unit 1300 includes upper mill 1360 and lower mill
1350 which grate an object to be grated and a lower mill support
portion 1340 to which lower mill 1350 is attached. In milling case
1310, lower mill support portion 1340, lower mill 1350, and upper
mill 1360 are successively provided from below.
[0334] Lower mill support portion 1340 supports lower mill 1350
from a side opposite to a side where upper mill 1360 is located (a
side below lower mill 1350). Lower mill support portion 1340 has a
substantially columnar main body portion 1341, an engagement
protrusion portion 1342, and a powder scraping portion 1343. A
milling shaft 1345 is provided on a lower surface of main body
portion 1341 and extends downward. Milling shaft 1345 is coupled to
milling driving force coupling mechanism 2130. Lower mill support
portion 1340 is thus rotatable while it supports lower mill
1350.
[0335] Engagement protrusion portion 1342 is provided on an upper
surface of main body portion 1341 and protrudes upward. Engagement
protrusion portion 1342 is a site for locking lower mill 1350.
Powder scraping portion 1343 is provided around a circumferential
portion of main body portion 1341. Powder scraping portion 1343
scrapes off tea leaf powders stored in storage portion 1311 and
transports the tea leaf powders to discharge path 1312 as lower
mill support portion 1340 rotates.
[0336] Lower mill 1350 includes a main surface 1350a arranged to be
opposed to a main surface 1360a of upper mill 1360, a main surface
1350b located opposite to main surface 1350a, and a circumferential
surface connecting main surface 1350a and main surface 1350b to
each other. Main surface 1350a of lower mill 1350 has a plurality
of shear grooves formed. The plurality of shear grooves are
provided, for example, to extend along an equiangular spiral. The
plurality of shear grooves may be constructed such that linear
grooves formed from the inner circumferential side toward the outer
circumference are radially provided.
[0337] An engagement recess portion 1352 is provided in main
surface 1350b of lower mill 1350. Engagement recess portion 1352 is
provided at a position corresponding to engagement protrusion
portion 1342 of lower mill support portion 1340 and locked by
engagement protrusion portion 1342. Lower mill 1350 rotates
together with lower mill support portion 1340. A core 1359
extending upward along a core of a rotation shaft is provided in a
central portion of lower mill 1350.
[0338] Core 1359 is provided to pass through a through hole 1361
provided in a central portion of upper mill 1360. Core 1359 has a
helically provided blade portion 1359a.
[0339] Upper mill 1360 includes main surface 1360a arranged to be
opposed to main surface 1350a of lower mill 1350, a main surface
1360b located opposite to main surface 1360a, and a circumferential
surface connecting main surface 1360a and main surface 1360b to
each other. A shear groove is formed in main surface 1360a of upper
mill 1360 as in main surface 1350a of the lower mill.
[0340] Upper mill 1360 is held by an upper mill holding member 1370
arranged above the upper mill. A not-shown hole portion is provided
in an upper surface of upper mill 1360. As a not-shown pin portion
provided in upper mill holding member 1370 enters the hole portion,
rotation of upper mill 1360 is prevented.
[0341] Upper mill holding member 1370 includes a bottom surface
portion 1371 provided with a hole portion 1371a, an outer
cylindrical portion 1372 erected upward from a circumference of
bottom surface portion 1371, and an inner cylindrical portion 1373
erected upward from a circumference of hole portion 1371a. Hole
portion 1371a is provided to communicate with through hole 1361 in
upper mill 1360. A spring 1381 pressing upper mill 1360 downward
and a spring holding member 1380 are accommodated in between outer
cylindrical portion 1372 and inner cylindrical portion 1373. Spring
1381 adjusts a grating pressure applied between upper mill 1360 and
lower mill 1350.
[0342] A hopper portion 1320 for supplying an object to be grated
in between upper mill 1360 and lower mill 1350 is attached to a
side of an upper end opening portion 1310b of milling case 1310.
Hopper portion 1320 has a top plate portion 1321, a cylindrical
portion 1322, and an object-to-be-grated inlet 1325. Top plate
portion 1321 has such a bowl shape that an opening portion 1323 is
provided substantially in a central portion. Cylindrical portion
1322 is provided to extend downward from a circumference of opening
portion 1323. Cylindrical portion 1322 is inserted in inner
cylindrical portion 1373.
[0343] Object-to-be-grated inlet 1325 is defined by opening portion
1323 and cylindrical portion 1322. A tip end side of core 1359 is
accommodated in object-to-be-grated inlet 1325. In cylindrical
portion 322, a plurality of linear ribs 1391, 1392, and 1393 are
provided across object-to-be-grated inlet 1325.
[0344] In grating tea leaves, hopper portion 1320 is preferably
covered with a cover portion 1330. Thus, after tea leaves are
introduced into object-to-be-grated inlet 1325, entry of a foreign
matter into milling unit 1300 and scattering of grated tea leaves
can be prevented. When tea leaves are to be introduced, cover
portion 1330 is removed from hopper portion 1320.
[0345] Tea leaves introduced into object-to-be-grated inlet 1325
are accommodated in a space defined by the upper surface of upper
mill 1360 exposed through upper mill holding member 1370 and an
inner circumferential surface of cylindrical portion 1322. Tea
leaves accommodated in the space are guided in between upper mill
1360 and lower mill 1350 as helical blade portion 1359a rotates
with rotation of lower mill 350.
[0346] Tea leaves guided in between upper mill 1360 and lower mill
1350 are grated and fall downward in a form of tea leaf powders
from a circumference of upper mill 1360 and lower mill 1350. Some
of fallen tea leaf powders is discharged through discharge path
1312 into tea leaf powder tray 1800 from outlet port 1312a. Other
fallen tea leaf powders are stored in storage portion 1311. Tea
leaf powders in storage portion 1311 are transported to discharge
path 1312 and discharged from outlet port 1312a into tea leaf
powder tray 1800 as powder scraping portion 1343 rotates with
rotation of lower mill support portion 1340.
[0347] (Structure of Agitation Unit 1500)
[0348] A structure of agitation unit 1500 will now be described
with reference to FIGS. 48 and 49. FIG. 48 is a perspective view of
agitation unit 1500 and FIG. 49 is a vertical cross-sectional view
of agitation unit 1500.
[0349] Agitation unit 1500 includes agitation tank 1510, agitation
blade 1550, and an agitation cover 1530. Agitation tank 1510
includes an exterior holder 1511 made of a resin and thermally
insulated tank 1512 held by exterior holder 1511. Thermally
insulated tank 1512 corresponds to a container main body of
agitation tank 1510. An integrally resin molded grip 1520 is
provided in exterior holder 1511. Thermally insulated tank 1512 has
an opening portion 1513 which has a cylindrical shape with bottom
and opens upward.
[0350] Agitation cover 1530 is attached to opening portion 1513 so
as to be able to open and close opening portion 1513. Agitation
cover 1530 is provided with a powder inlet 1531 for introducing tea
leaf powders grated by milling unit 1300 and a hot water supply
inlet 1532 through which hot water formed in apparatus main body
1100 is poured from hot water supply nozzle 1170. Hot water supply
inlet 1532 is provided at a position corresponding to supply port
1171 of hot water supply nozzle 1170.
[0351] Powder inlet 1531 and hot water supply inlet 1532
communicate with opening portion 1513. Tea leaf powders introduced
from moved tea leaf powder tray 1800 to powder inlet 1531 are
introduced into thermally insulated tank 1512 through opening
portion 1513. Hot water poured through hot water supply inlet 1532
from hot water supply nozzle 1170 is supplied into thermally
insulated tank 1512 through opening portion 1513.
[0352] Agitation blade 1550 is placed on a bottom portion of
agitation tank 1510. A rotation shaft 1560 extending upward is
provided on the bottom portion of agitation tank 1510, and a
cylindrical core 1250 for agitation blade 1550 is inserted in this
rotation shaft 1560.
[0353] A permanent magnet 1240 is embedded in agitation blade 1550.
In agitation motor contactless table 1140A, permanent magnet 1240
embedded in agitation blade 1550 and permanent magnet 1141 provided
on a side of agitation motor unit 1140 are magnetically coupled in
a contactless state, so that rotational driving force of agitation
motor unit 1140 is transmitted to agitation blade 1550.
[0354] Though an example in which agitation blade 1550 constructed
as above is employed as the agitation member is illustrated and
described, limitation thereto is not intended and an agitation
member having an agitation element in the outer circumferential
portion can be adopted as the agitation member as appropriate. A
wound portion formed from a wire in a toroidal shape or an impeller
can be adopted as the agitation element.
[0355] Agitation tank 1510 is provided with discharge mechanism
1540. Discharge mechanism 1540 is a mechanism for discharging tea
(a liquid mixture) prepared by agitation of hot water (a liquid)
and tea leaf powders (powders) by agitation blade 1550 from
agitation tank 1510 to the outside.
[0356] Discharge mechanism 1540 includes a discharge port 1541
communicating with a container of agitation tank 1510, an opening
and closing nozzle 1543 inserted into discharge port 1541 so as to
be able to open and close discharge port 1541, and operation lever
1542 controlling a position of opening and closing nozzle 1543.
Operation lever 1542 corresponds to an operation portion for
operating discharge mechanism 1540.
[0357] Opening and closing nozzle 1543 is biased to close discharge
port 1541 by a biasing member (not shown) such as a spring in a
normal state. When a user moves operation lever 1542 against
biasing force, opening and closing nozzle 1543 moves to open
discharge port 1541 and thus tea in agitation tank 1510 is
discharged into a cup (not shown) placed on placement base
1900.
[0358] An operation of agitation blade 1550 in discharging of tea
in agitation tank 1510 will be described. FIG. 50 is a flowchart
showing details of a discharging step in a flow for preparation of
a beverage using the beverage preparation apparatus according to
the present embodiment. Details of the discharging step will be
described with reference to FIG. 50.
[0359] In the discharging step, initially, when the discharging
step is started as shown in a step 118, an operation for opening
discharge port 1541 in a step 1181 and start of an agitation
operation in a step 1183 are simultaneously performed.
Specifically, as the user moves operation lever 1542 against
biasing force, opening and closing nozzle 1543 moves up to open
discharge port 1541. Simultaneously, in coordination of the
operation of operation lever 1542, a switch (not shown) provided in
apparatus main body 1100 is pressed. The switch is thus turned on.
The switch corresponds to the sensing device 1115.
[0360] When the switch is pressed to be turned on, the switch
senses timing of an operation of operation lever 1542, that is,
timing of discharge of tea from discharge mechanism 1540 to the
outside, and inputs a sensing signal indicative of sensing of the
timing to control unit 1110. Control unit 1110 controls agitation
motor unit 1140 such that agitation blade 1550 rotates based on the
input sensing signal. Thus, agitation blade 1550 rotates
simultaneously with opening of discharge port 1541.
[0361] After a prescribed period of time has elapsed since opening
of discharge port 1541 such that a desired amount of tea is
discharged into a cup, discharge port 1541 is closed in a step
1182. Specifically, as the user returns operation lever 1542 from a
moved state to the original state against biasing force, opening
and closing nozzle 1543 moves down to close discharge port 1541.
Simultaneously, the switch is turned off from the on state.
[0362] During a period from step 1181 to step 1182, control unit
1110 controls agitation motor unit 1140 such that agitation blade
1550 is continuously or intermittently rotationally driven.
Specifically, in a step 1184, control unit 1110 determines whether
a mode is set to a continuous rotation mode or an intermittent
rotation mode. Whether the mode is set to the continuous rotation
mode or the intermittent rotation mode is determined, for example,
by selection made by a user in advance through an operation panel.
When any one of the continuous rotation mode and the intermittent
rotation mode is set in advance, step 1184 is not performed but any
one of a step 1185A and a step 1185B is performed.
[0363] When control unit 1110 determines in step 1184 that the mode
is set to the continuous rotation mode (step 1184: YES), step 1185A
is performed. In step 1185A, control unit 1110 controls agitation
motor unit 1140 such that agitation blade 1550 is continuously
rotationally driven during a period from opening of discharge port
1541 until closing of discharge port 1542. Thus, when a liquid (a
liquid mixture composed of powders and a liquid) is discharged from
discharge mechanism 1540 to the outside, agitation blade 1550
continuously rotates. A time period for agitation may be set to a
time period from opening of discharge port 1541 until lapse of a
prescribed period of time. Such a time period for agitation can be
indicated through input portion 1112 described above.
[0364] When control unit 1110 determines in step 1184 that the mode
is set to the intermittent rotation mode (step 1184: NO), step
1185B is performed. In step 1185B, control unit 1110 controls
agitation motor unit 1140 such that agitation blade 1550 is
intermittently rotationally driven during a period from opening of
discharge port 1541 until closing of discharge port 1542. Thus,
when a liquid is discharged from discharge mechanism 1540 to the
outside, agitation blade 1550 intermittently rotates. Being
intermittently rotationally driven means repeated rotation for a
prescribed period of time at a prescribed interval based on a
prescribed cycle of ON and OFF. Timing of rotation of agitation
blade 1550 can be set as appropriate, and agitation may be carried
out only immediately after opening of discharge port 1541 and
immediately before closing of the discharge port. The number of
rotations of the agitation blade may be set to one only within a
prescribed period of time during a period from opening of discharge
port 1541 until closing of discharge port 1542. A time period
during which agitation blade 1550 is rotationally driven and/or the
number of rotations can be indicated through input portion 1112
described above.
[0365] Then, in a step 1186, control unit 1110 controls agitation
motor unit 1140 such that a rotation operation of agitation blade
1550 is stopped. Agitation thus ends. The discharging step ends as
shown in a step 1189 with closing of discharge port 1541 in step
1182 and end of agitation in step 1186.
[0366] Change in state of tea in agitation tank 1510 as a result of
such discharging will be described. FIG. 51 is a diagram showing a
state in the agitation tank in the step of starting agitation shown
in FIG. 41. FIG. 52 is a diagram showing a state in the agitation
tank after a prescribed period of time has elapsed since end of
agitation in the step of end of agitation shown in FIG. 41. FIG. 53
is a diagram showing a state of tea discharged in the discharging
step shown in FIG. 41.
[0367] As shown in FIG. 51, during a period in which step 116 to
step 117 in FIG. 41 are performed, control unit 1110 controls
agitation motor unit 1140 such that agitation blade 1550 is
rotationally driven for agitating hot water and tea leaf powders
supplied into agitation tank 1510. In this state, agitation blade
1550 is rotationally driven so that centrifugal force is applied to
hot water in agitation tank 1510. Thus, a liquid level S is formed
to swirl so that air can be taken into hot water. Air which has
been taken in is finely crushed by the blade portion of agitation
blade 1550 to become air bubbles B and the air bubbles are
uniformly dispersed in hot water together with tea leaf powders P.
Thus, fine foams and tea substantially constant in concentration
are produced.
[0368] As shown in FIG. 52, when agitation in step 117 in FIG. 41
ends and a prescribed period of time has elapsed before start of
discharging in step S118, produced tea is separated into a layer
containing a large amount of air bubbles B (foams) (a layer S1), a
layer containing a small amount of tea leaf powders (a layer S2),
and a layer containing a large amount of tea leaf powders (a layer
S3).
[0369] Layer S1 is small in specific gravity because it contains a
large amount of foams. Therefore, after agitation in step 117 ends,
layer S1 is substantially immediately separated. Layer 2 and layer
3 are separated as tea leaf powders settle down toward the bottom
portion of agitation tank 1510. Therefore, time necessary for layer
2 and layer 3 to be separated is longer to some extent than time
for layer S1 to be separated.
[0370] In this case, since an amount of tea leaf powders contained
in layer S2 is smaller than an amount of tea leaf powders contained
in layer S3, specific gravity (concentration) of layer S2 is
smaller than specific gravity (concentration) of layer S3.
[0371] When tea in which portions different from each other in
specific gravity are thus separated is discharged, the tea is
discharged successively from layer S3. Therefore, when several
servings of tea are prepared, only tea high in concentration may be
discharged and foams may not be discharged. It is thus concerned
that tea different from preference of a user may be discharged.
[0372] In the present embodiment, as described in connection with
the discharging step above, control unit 1110 controls agitation
motor unit 1140 such that agitation blade 1550 is rotationally
driven simultaneously with start of discharging of tea by discharge
mechanism 1540 based on a sensing signal input as a result of
sensing by the sensing device 1115 of timing of discharge from
discharge mechanism 1540.
[0373] Thus, agitation blade 1550 rotates during discharging of
tea, so that tea can be discharged into a cup while air bubbles B
and tea leaf powders P are uniformly dispersed as shown in FIG.
53.
[0374] Thus, control unit 1110 controls agitation motor unit 1140
such that agitation blade 1550 is rotationally driven
simultaneously with start of discharging of tea by discharge
mechanism 1540 in a signal input state that the sensing signal has
been input. Accordingly, beverage preparation apparatus 1001
according to the present embodiment can discharge a beverage having
desired specific gravity in accordance with preference of a user
while the beverage preparation apparatus prepares a desired amount
of beverage.
[0375] When agitation blade 1550 is intermittently rotated while
tea is discharged from discharge port 1541, no negative pressure
originating from rotation of agitation blade 1550 is generated
during a period in which agitation blade 1550 is not operating.
Therefore, a speed of discharging of tea from discharge port 1541
can be higher. Thus, a time period for discharging a necessary
amount of tea can be decreased. When agitation blade 1550 is
continuously rotated as well, a time period during which no
negative pressure is generated can be provided by restricting a
time period for agitation. Therefore, a time period for discharging
tea can be decreased. An amount of foams can also be adjusted by
adjusting a time period for agitation.
[0376] Though an example in which a prescribed period of time has
elapsed by the time of start of discharging in step 118 since end
of agitation in step 117 and tea is separated into layer S1, layer
S2, and layer S3 is illustrated and described in the present
embodiment, separation of tea is not limited to such an
example.
[0377] For example, tea may be separated into two layers of a layer
containing a large amount of foams and a liquid layer substantially
uniform in concentration. In this case, the layer containing a
large amount of foams is separated immediately after end of
agitation in step 117. Therefore, a prescribed period of time after
end of step 117 until start of discharging in step 118 includes
also a very short time period in which foams are separated from a
liquid.
[0378] Though an example in which the sensing device 1115 is
implemented by a switch provided to be in coordination with an
operation of operation lever 1542 is illustrated and described in
the present embodiment, limitation thereto is not intended and it
may be implemented by a switch provided not to be in coordination
with an operation of operation lever 1542. In this case, timing to
press the switch may be before an operation of operation lever 1542
in the discharging step. In this case, an agitation operation is
started first in step 1183, and discharge port 1541 may be opened
and closed by an operation of operation lever 1542 by a user by the
time of end of the agitation operation in step 1186. Furthermore,
in this case, beverage preparation apparatus 1001 desirably has
means for notifying a user of a discharging stand-by state during a
period from step 1183 until step 1186. The switch may be pressed
after the operation of operation lever 1542.
Embodiment 11
[0379] FIG. 54 is a flowchart showing details of the discharging
step in the flow for preparation of a beverage using the beverage
preparation apparatus according to the present embodiment. The
discharging step according to the present embodiment will be
described with reference to FIG. 54.
[0380] As shown in FIG. 54, the step of discharging from the
agitation unit according to the present embodiment is different
from the step of discharging from agitation unit 1500 according to
Embodiment 10 in timing of rotation of agitation blade 1550.
Specifically, in the discharging step in the beverage preparation
flow in the beverage preparation apparatus according to the present
embodiment, agitation blade 1550 rotates after lapse of a
prescribed period of time since opening of discharge port 1541.
[0381] More specifically, initially, when the discharging step is
started as shown in step 118, discharge port 1541 is opened in step
1181. Specifically, as a user moves operation lever 1542 against
biasing force, opening and closing nozzle 1543 moves up to thereby
open discharge port 1541. In succession, after a prescribed period
of time (a first time period) has elapsed since opening of
discharge port 1541 for discharging of a desired amount of tea into
a cup, discharge port 1541 is closed in step 1182.
[0382] During a period in which step 1181 and step 1182 are
performed, operations from a step 1183A to step 1186 are performed
in parallel. When the user moves operation lever 1542 in step 1181,
a switch (not shown) provided in apparatus main body 1100 is
pressed in coordination with an operation of operation lever 1542.
The switch is thus turned on.
[0383] As the switch is turned on, the switch senses timing of
discharging of tea from discharge mechanism 1540 to the outside and
inputs a sensing signal indicative of sensing of the timing to
control unit 1110.
[0384] In a signal input state that the sensing signal has been
input to control unit 1110, initially, in step 1183A, control unit
1110 checks whether or not a prescribed period of time (a second
time period shorter than a first time period) has elapsed since
opening of discharge port 1541. When the prescribed period of time
has elapsed (step 1183A: YES), a step 1183B is performed. When the
prescribed period of time has not elapsed (step 1183A: NO), the
control unit stands by until the prescribed period of time
elapses.
[0385] Then, in step 1183B, control unit 1110 controls agitation
motor unit 1140 such that agitation blade 1550 rotates. In
succession, during a period from step 1184 to step 1186, control
unit 1110 performs operations similar to those in step 1184 to step
1186 according to Embodiment 10 and controls agitation motor unit
1140 such that agitation blade 1550 continuously or intermittently
rotates. A time period of rotation of agitation blade 1550 is
shorter than the first time period described above.
[0386] In step 1186, control unit 1110 controls agitation motor
unit 1140 such that a rotation operation of agitation blade 1550 is
stopped. Agitation thus ends. Thus, the discharging step ends as
shown in step 1189 with closing of discharge port 1541 in step 1182
and end of agitation in step 1186.
[0387] As the operations as above are performed, in the discharging
step in the present embodiment, tea great in specific gravity is
mainly discharged during a period from opening of discharge port
1541 until start of agitation. Therefore, the discharging step is
preferably started as immediately as possible after end of
agitation in step 117 shown in FIG. 41. In this case, settling of
tea leaf powders can be suppressed and tea relatively uniform in
concentration can be discharged into a cup.
[0388] Then, during a period from start of agitation until closing
of discharge port 1541, tea in agitation tank 1510 is agitated as a
result of rotation of agitation blade 1550, so that tea in which
air bubbles and tea leaf powders are uniformly dispersed is
discharged into a cup. In this case, since some of tea is
discharged before agitation, an amount of tea in agitation tank
1510 has been decreased by the time of agitation. Therefore, tea
containing a large amount of foams as a result of agitation is
prepared.
[0389] Therefore, topped-up tea mainly contains a large amount of
foams. Tea can be supplied into a cup in such a manner that fine
foams are carried over tea substantially constant in concentration
which has previously been poured into the cup. When a user desires
to taste tea with good texture and good gulp feeling, such a
discharging step is preferably employed.
[0390] Thus, control unit 1110 controls agitation motor unit 1140
such that agitation blade 1550 is rotationally driven after lapse
of a prescribed period of time since input of a sensing signal from
the sensing device 1115 and discharging of a liquid from discharge
mechanism 1540 to the outside. Thus, the beverage preparation
apparatus according to the present embodiment can also discharge a
beverage having desired specific gravity in accordance with
preference of a user while the beverage preparation apparatus
prepares a desired amount of beverage.
Embodiment 12
[0391] FIG. 55 is a flowchart showing details of the discharging
step in the flow for preparation of a beverage using the beverage
preparation apparatus according to the present embodiment. The
discharging step according to the present embodiment will be
described with reference to FIG. 55.
[0392] As shown in FIG. 55, the discharging step in the beverage
preparation flow according to the present embodiment is different
from the discharging step in the first preparation flow according
to Embodiment 10 in timing of rotation of agitation blade 1550.
Specifically, in the step of discharging from the agitation unit
according to the present embodiment, agitation is started by the
time of opening of discharge port 1541. The agitation unit
according to the present embodiment is different from agitation
unit 1500 according to Embodiment 10 in construction of the
discharge mechanism. Specifically, the discharge mechanism in
agitation unit 1500 includes opening and closing means for
automatically opening and closing discharge port 1541 such as an
electromagnetic valve (not shown) instead of operation lever 1542
and opening and closing nozzle 1543. Operation means for operating
the opening and closing means is provided.
[0393] In the discharging step according to the present embodiment,
initially, a user operates operation means provided in apparatus
main body 1100 at the timing when the user desires discharging. For
operation means, a push button for starting a control operation or
a liquid crystal display integrated with a touch sensor can be
adopted. The operation means functions as an operation portion for
operating discharge mechanism 1540 as above and also functions as
the sensing device 1115. The operation means inputs the timing of
operation to control unit 1110.
[0394] As shown in step 118, the discharging step is started as the
operation portion is operated. As the operation portion is
operated, the operation portion senses the timing of discharging of
tea from the discharge mechanism to the outside and inputs a
sensing signal indicative of sensing of timing to control unit
1110. Control unit 1110 controls agitation motor unit 1140 such
that agitation blade 1550 rotates in step S183 based on the input
sensing signal.
[0395] In succession, during a period from step 1184 to step 1186,
control unit 1110 performs operations similar to those in step 1184
to step 1186 according to Embodiment 10, and controls agitation
motor unit 1140 such that agitation blade 1550 continuously or
intermittently rotates. In step 1186, control unit 1110 controls
agitation motor unit 1140 such that the rotation operation of
agitation blade 1550 is stopped. Agitation thus ends.
[0396] In succession, in a step 1188A, control unit 1110 sets an
electromagnetic valve of discharge mechanism 1540 to open to
thereby open discharge port 1541. After a prescribed period of time
has elapsed since opening of discharge port 1541 such that a
desired amount of tea is discharged into a cup, discharge port 1541
is closed in a step 1188B. Thus, the discharging step ends as shown
in step 1189.
[0397] As the operations as above are performed, in the discharging
step in the present embodiment, tea great in specific gravity is
mainly discharged during a period from opening of discharge port
1541 until closing of discharge port 1541.
[0398] Therefore, preferably, discharge port 1541 is opened as
immediately as possible after end of agitation in step 1186 so that
tea in agitation tank 1510 is discharged into the cup. In this
case, settling of tea leaf powders can be suppressed and tea
relatively uniform in concentration can be discharged into the cup.
When a user prefers tea containing less foam, such a discharging
step is preferably employed.
[0399] Thus, control unit 1110 controls agitation motor unit 1140
such that agitation blade 1550 is rotationally driven before a
sensing signal is input from the sensing device 1115 and a liquid
(tea) is discharged from discharge mechanism 1540 to the outside.
Thus, the beverage preparation apparatus according to the present
embodiment can also discharge a beverage having desired specific
gravity in accordance with preference of a user while the beverage
preparation apparatus prepares a desired amount of beverage.
[0400] Though an example in which agitation by agitation blade 1550
ends before discharge port 1541 is opened is illustrated and
described in the present embodiment, limitation thereto is not
intended and agitation by agitation blade 1550 may end after
opening of discharge port 1541. Namely, step 1186 may be performed
after step 1188A.
Embodiment 13
[0401] FIG. 56 is a flowchart showing an operation of the agitation
unit between the step of end of agitation preceding the discharging
step and the discharging step in the flow for preparation of a
beverage using the beverage preparation apparatus according to the
present embodiment. A preparation flow in the beverage preparation
apparatus according to the present embodiment will be described
with reference to FIG. 56.
[0402] As shown in FIG. 56, in the preparation flow for preparing
tea with the use of the beverage preparation apparatus according to
the present embodiment, steps (operations) from a step 11171 to a
step 1173 are introduced between step S17 and step 118 in the first
preparation flow for preparing tea with the use of the beverage
preparation apparatus according to Embodiment 10.
[0403] Specifically, after agitation ends in step 117, control unit
110 checks in step 11171 whether or not a sensing signal has been
input from the sensing device 1115 within a prescribed period of
time. When the sensing signal has been input within a prescribed
period of time (step 11171: YES), step 118 is started.
[0404] When the sensing signal has not been input within the
prescribed period of time (step 11171: NO), a step 1172 is
performed. In step 1172, control unit 1110 controls agitation motor
unit 1140 such that agitation blade 1550 is rotationally
driven.
[0405] Then, in a step 1173, control unit 1110 performs operations
the same as in step 1184 according to Embodiment 10 and determines
whether to continuously or intermittently rotate agitation blade
1550. When control unit 1110 determines in step 1173 that the mode
is set to the continuous rotation mode (step 1173: YES), a step
1174A is performed. In step 1174A, control unit 1110 controls
agitation motor unit 1140 such that agitation blade 1550 is
continuously rotationally driven.
[0406] When control unit 1110 determines in step 1173 that the mode
has been set to the intermittent rotation mode (step 1173: NO), a
step 1174B is performed. In step 1174B, control unit 1110 controls
agitation motor unit 1140 such that agitation blade 1550 is
intermittently rotationally driven.
[0407] After agitation blade 1550 continuously or intermittently
rotates for a prescribed period of time, control unit 1110 controls
agitation motor unit 1140 such that rotation of agitation blade
1550 is stopped. Then, an operation from step 11171 is
repeated.
[0408] Thus, control unit 1110 controls agitation motor unit 1140
such that agitation blade 1550 periodically rotates after agitation
blade 1550 rotated for a prescribed period of time in a normal
preparation flow before the sensing device 1115 senses the timing
of discharging of tea. Thus, tea leaf powders can be prevented from
settling down to the bottom portion of agitation tank 1510 by the
time of start of the discharging step.
[0409] Though an operation between the step of end of agitation and
the discharging step according to Embodiment 13 is illustrated and
described as being applied to the first preparation flow in the
beverage preparation apparatus according to Embodiment 10,
limitation thereto is not intended. The operation may be applied to
the second preparation flow and the third preparation flow in the
beverage preparation apparatus according to Embodiment 10 or to the
beverage preparation flow according to Embodiment 11 or 3.
Embodiment 14
[0410] FIG. 57 is a cross-sectional view of a beverage preparation
apparatus according to the present embodiment. A beverage
preparation apparatus 1001D according to the present embodiment
will be described with reference to FIG. 57.
[0411] Beverage preparation apparatus 1001D according to the
present embodiment is different from beverage preparation apparatus
1001 according to Embodiment 10 in that an agitation tank sensing
device 1116 for sensing whether or not agitation unit 1500 has been
attached to agitation tank attachment portion 1190 is provided. The
construction is otherwise substantially the same.
[0412] The agitation tank sensing device 1116 is attached, for
example, to liquid supply path 1155 and provided to pass through a
part of apparatus main body 1100 defining agitation tank attachment
portion 1190. The agitation tank sensing device 1116 is in contact
with agitation unit 1500 while agitation unit 1500 is attached.
Various sensors such as an optical sensor and a load sensor can be
employed as the agitation tank sensing device 1116. When an optical
sensor is employed, the agitation sensing device 1116 does not have
to be in contact with the agitation unit. The agitation tank
sensing device 1116 should only be provided in apparatus main body
1100 such that attachment of agitation unit 1500 can be sensed
through a through hole provided in a part of apparatus main body
1100 defining agitation tank attachment portion 1190.
[0413] In the present embodiment, during a period in which the
agitation tank sensing device 20 is sensing attachment of the
agitation unit, agitation blade 1550 is set to be intermittently
rotationally driven. Thus, even when a time period from end of
agitation in step 117 in the first preparation flow until start of
the discharging step in step 118, for example, as shown in FIG. 41
is long, settling of powders or break of foams can be
prevented.
[0414] Thus, in the present embodiment, even when a time period
from end of agitation in step 117 until start of the discharging
step in step 118 is long, settling of powders or break of foams can
be prevented in addition to achievement of an effect substantially
the same as the effect of the beverage preparation apparatus
according to Embodiment 10.
[0415] Though an example in which the discharging step in
Embodiments 10 to 3 and Embodiment 14 described above is applied to
the discharging step in the first preparation flow in the beverage
preparation apparatus according to Embodiment 10 is illustrated and
described above, limitation thereto is not intended and the
discharging step may be applicable to the discharging step in the
second preparation flow and the discharging step in the third
preparation flow.
[0416] Though an example in which the beverage preparation
apparatus includes the sensing device is illustrated and described
in Embodiments 10 to 5 above, limitation thereto is not intended
and the beverage preparation apparatus does not have to include the
sensing device. In this case, agitation blade 1550 may continuously
or intermittently rotate, for example, until power of the beverage
preparation apparatus is turned off. In this case, operation lever
1542 or an operation panel is operated at the timing of rotation of
agitation blade 1550. Thus, in discharging a liquid from discharge
mechanism 1540 to the outside, a state that agitation blade 1550 is
rotationally driven can be established.
Embodiment 15
Beverage Preparation Apparatus 2001
[0417] A beverage preparation apparatus 2001 in the present
embodiment will be described with reference to FIGS. 58 to 60. FIG.
58 is an overall perspective view of beverage preparation apparatus
2001, FIG. 59 is a cross-sectional view along the line II-II in
FIG. 58, and FIG. 60 is an overall perspective view of a schematic
component of beverage preparation apparatus 2001.
[0418] As shown in FIGS. 58 to 60, beverage preparation apparatus
2001 uses tea leaves as an object to be grated and obtains tea leaf
powders by grating the tea leaves. The beverage preparation
apparatus uses the obtained tea leaf powders for preparing tea as a
beverage. Beverage preparation apparatus 2001 includes an apparatus
main body 2100 as a main body portion, a milling unit 2300, an
agitation unit 2500, a liquid storage tank 2700, a liquid supply
path 2155 as a liquid supply portion (see FIG. 59), a tea leaf
powder tray 2800 as a powder reception portion, and a placement
base 2900. Placement base 2900 is provided to protrude forward on a
front side in a lower portion of apparatus main body 2100 and a cup
(not shown) and tea leaf powder tray 2800 can be placed thereon.
Tea leaf powder tray 2800 is provided such that a user can move the
tray by holding the tray.
[0419] (Milling Unit 2300)
[0420] Milling unit 2300 is removably attached to a milling unit
attachment portion 2180 provided on a front surface side of
apparatus main body 2100. A milling driving force coupling
mechanism 2130 is provided in milling unit attachment portion 2180
so as to protrude forward and milling unit 2300 is removably
attached to milling driving force coupling mechanism 2130. Milling
unit 2300 obtains driving force for milling tea leaves representing
an object to be grated by being coupled to milling driving force
coupling mechanism 2130.
[0421] Tea leaves introduced from an upper portion of milling unit
2300 into milling unit 2300 are finely grated in milling unit 2300.
The grated tea leaves are dropped and collected as tea leaf powders
on tea leaf powder tray 2800 placed below milling unit 2300. A
detailed structure of milling unit 2300 will be described later
with reference to FIGS. 65 to 67.
[0422] (Liquid Storage Tank 2700)
[0423] Liquid storage tank 2700 is removably attached to a liquid
storage tank attachment portion 2195 provided on an upper surface
side of apparatus main body 2100. Liquid storage tank 2700 includes
a tank main body 2710 having an opening in an upper surface and a
lid portion 2720 closing the opening in the upper surface of tank
main body 2710. Liquid storage tank 2700 stores such a liquid as
water which is introduced from the outside by removing lid portion
2720.
[0424] (Liquid Supply Path 2155)
[0425] Liquid supply path 2155 is accommodated in apparatus main
body 2100. Liquid supply path 2155 is connected to liquid storage
tank 2700 (see FIG. 64). Liquid supply path 2155 is provided with a
supply port 2171 on a side opposite to a side where liquid storage
tank 2700 is connected. Liquid supply path 2155 includes a hot
water supply pipe 2150 and a hot water supply nozzle 2170. Hot
water supply pipe 2150 has one end side connected to liquid storage
tank 2700 and the other end side connected to hot water supply
nozzle 2170. A liquid introduced from liquid storage tank 2700 into
liquid supply path 2155 is supplied to agitation unit 2500 through
hot water supply pipe 2150 and hot water supply nozzle 2170.
[0426] (Agitation Unit 2500)
[0427] Agitation unit 2500 includes an agitation blade 2550 for
agitating a liquid and powders and agitation tank 2510
accommodating agitation blade 2550. Agitation blade 2550
corresponds to an agitation member. Agitation tank 2510 is
removably attached to an agitation tank attachment portion 2190
provided on the front surface side of apparatus main body 2100.
Agitation tank 2510 is attached to agitation tank attachment
portion 2190 such that a part of agitation tank 2510 protrudes from
a front surface of apparatus main body 2100 in a direction of
normal to the front surface.
[0428] An agitation motor contactless table 2140A is provided in
agitation tank attachment portion 2190. Agitation unit 2500 is
placed on agitation motor contactless table 2140A. Agitation blade
2550 provided in agitation unit 2500 is rotated by an agitation
motor unit 2140 and a permanent magnet 2141 coupled thereto.
Agitation motor unit 2140 and permanent magnet 2141 are
accommodated in apparatus main body 2100 so as to be located below
agitation motor contactless table 2140A. Agitation motor unit 2140
corresponds to an agitation blade drive portion which rotationally
drives agitation blade 2550.
[0429] Hot water supply nozzle 2170 is provided above agitation
tank attachment portion 2190 of apparatus main body 2100. In
apparatus main body 2100, a temperature of water in hot water
supply pipe 2150 is raised to a prescribed temperature and hot
water is supplied from hot water supply nozzle 2170 into agitation
tank 2510. Hot water prepared in apparatus main body 2100 and tea
leaf powders obtained by milling unit 2300 are introduced into
agitation tank 2510, and hot water and tea leaf powders are
agitated by agitation blade 2550 in agitation tank 2510. Tea is
thus prepared in agitation tank 2510.
[0430] Tea prepared in agitation unit 2500 can be poured into a cup
(not shown) placed on placement base 2900 by operating an operation
lever 2542 of a discharge mechanism 2540 provided below agitation
unit 2500. A detailed structure of agitation unit 2500 will be
described later with reference to FIGS. 68 and 69.
[0431] (Flow of Preparation of Tea (Beverage))
[0432] A flow of preparation of tea (beverage) with the use of
beverage preparation apparatus 2001 will now be described with
reference to FIGS. 61 to 63. FIGS. 61 to 63 show first to third
preparation flows showing discharge of tea using beverage
preparation apparatus 2001, respectively. A prescribed amount of
tea leaves is introduced into milling unit 2300 and a prescribed
amount of water is stored in liquid storage tank 2700.
[0433] (First Preparation Flow)
[0434] A first preparation flow will be described with reference to
FIG. 61. This first preparation flow is a flow in which grating of
tea leaves in milling unit 2300 and supply of hot water from
apparatus main body 2100 to agitation unit 2500 are simultaneously
carried out.
[0435] In beverage preparation apparatus 2001, milling of tea
leaves by milling unit 2300 in a step 2211 and supply of hot water
from apparatus main body 2100 to agitation unit 2500 in a step 2213
are simultaneously started. Then, milling of tea leaves by milling
unit 2300 ends in a step 2212, and supply of hot water from
apparatus main body 2100 to agitation unit 2500 ends in a step
2214.
[0436] In a step 2215, tea leaf powders obtained in step 2212 are
introduced into agitation unit 2500 by a user.
[0437] Then, in a step 2216, agitation of the tea leaf powders and
hot water in agitation unit 2500 is started. In a step 2217,
agitation of the tea leaf powders and hot water in agitation unit
2500 ends. In a step 2218, tea is discharged into the cup placed on
placement base 2900 as the user operates operation lever 2542 of
discharge mechanism 2540 provided below agitation unit 2500.
According to the present flow, since milling of tea leaves and
supply of hot water are simultaneously performed, a tea beverage
can efficiently be prepared in a short period of time.
[0438] (Second Preparation Flow)
[0439] A second preparation flow will be described with reference
to FIG. 62. This second preparation flow is a flow in which hot
water is supplied from apparatus main body 2100 to agitation unit
2500 after tea leaves are grated in milling unit 2300.
[0440] In beverage preparation apparatus 2001, in a step 221,
milling of tea leaves by milling unit 2300 is started. In a step
222, milling of tea leaves by milling unit 2300 ends. In a step
223, tea leaf powders obtained in step 222 are introduced into
agitation unit 2500 by a user.
[0441] In a step 224, supply of hot water from apparatus main body
2100 to agitation unit 2500 is started. In a step 225, supply of
hot water from apparatus main body 2100 to agitation unit 2500
ends.
[0442] Then, in a step 226, agitation of the tea leaf powders and
hot water in agitation unit 2500 is started. In a step 227,
agitation of the tea leaf powders and hot water in agitation unit
2500 ends. In a step 228, tea is discharged into the cup placed on
placement base 2900 as the user operates operation lever 2542 of
discharge mechanism 2540 provided below agitation unit 2500.
According to the present flow, since hot water is supplied after
tea leaves are milled, lowering in temperature of hot water can be
suppressed.
[0443] (Third Preparation Flow)
[0444] A third preparation flow will be described with reference to
FIG. 63. This third preparation flow includes a step of cooling hot
water by agitation in agitation unit 2500.
[0445] In beverage preparation apparatus 2001, milling of tea
leaves by milling unit 2300 in a step 231 and supply of hot water
from apparatus main body 2100 to agitation unit 2500 in a step 233
are simultaneously started. In a step 234, supply of hot water from
apparatus main body 2100 to agitation unit 2500 ends.
[0446] Then, in a step 232, milling of tea leaves by milling unit
2300 ends, and in a step 235, cooling by agitation of hot water
supply is started in agitation unit 2500. In a step 236, cooling by
agitation of hot water supply in agitation unit 2500 ends.
[0447] In a step 237, the tea leaf powders obtained in step 232 are
introduced into agitation unit 2500 by a user.
[0448] Then, in a step 238, agitation of the tea leaf powders and
hot water in agitation unit 2500 is started. In a step 239,
agitation of the tea leaf powders and hot water in agitation unit
2500 ends. In a step 240, tea is discharged into the cup placed on
placement base 2900 as the user operates operation lever 2542 of
discharge mechanism 2540 provided below agitation unit 2500.
According to the present flow, a tea beverage can be prepared at an
appropriate temperature from tea leaves suitable for hot water at a
relatively low temperature, such as gyokuro.
[0449] (Internal Structure of Apparatus Main Body 2100)
[0450] An internal structure of apparatus main body 2100 will now
be described with reference to FIG. 64. FIG. 64 is a perspective
view showing the internal structure of beverage preparation
apparatus 2001. In apparatus main body 2100 of beverage preparation
apparatus 2001, a control unit 2110 including a printed circuit
board on which electronic components are mounted is arranged on a
front surface side of liquid storage tank 2700. Based on input of a
start signal by a user, the flow for preparation of tea is executed
by control unit 2110.
[0451] A milling motor unit 2120 for providing driving force to
milling unit 2300 is arranged at a position below control unit
2110. Milling driving force coupling mechanism 2130 provided to
protrude forward for transmitting driving force of milling motor
unit 2120 to milling unit 2300 is provided at a position below
milling motor unit 2120.
[0452] To a bottom surface of liquid storage tank 2700, one end of
hot water supply pipe 2150 extending once downward from the bottom
surface and then extending upward in a U shape is coupled. Hot
water supply nozzle 2170 for pouring hot water into agitation tank
2510 of agitation unit 2500 is coupled to an upper end portion of
hot water supply pipe 2150. A U-shaped heater 2160 for heating
water which passes through hot water supply pipe 2150 is attached
to an intermediate region of hot water supply pipe 2150.
[0453] (Structure of Milling Unit 2300)
[0454] A structure of milling unit 2300 will now be described with
reference to FIGS. 65 to 67. FIG. 65 is a perspective view of
milling unit 2300, FIG. 66 is an exploded perspective view of
milling unit 2300, and FIG. 67 is a vertical cross-sectional view
of milling unit 2300.
[0455] Milling unit 2300 has a milling case 2310 having a
cylindrical shape as a whole, and a window for coupling 2300W in
which milling driving force coupling mechanism 2130 is inserted is
provided in a side surface below. A storage portion 2311 (see FIG.
67) for storing tea leaf powders produced by an upper mill 2360 and
a lower mill 2350 and a discharge path 2312 communicating with
storage portion 2311 are provided. An outlet port 2312a for
discharging tea leaf powders into tea leaf powder tray 2800 is
provided at a lower end portion of discharge path 2312 which is a
lowermost end portion of milling case 2310. Outlet port 2312a is
provided below an opening portion 2513 of a thermally insulated
tank 2512 (see FIG. 69) which will be described later. Entry
through outlet port 2312a, of steam resulting from hot water
supplied into thermally insulated tank 2512 can thus be
prevented.
[0456] Milling unit 2300 includes upper mill 2360 and lower mill
2350 which grate an object to be grated and a lower mill support
portion 2340 to which lower mill 2350 is attached. In milling case
2310, lower mill support portion 2340, lower mill 2350, and upper
mill 2360 are successively provided from below.
[0457] Lower mill support portion 2340 supports lower mill 2350
from a side opposite to a side where upper mill 2360 is located (a
side below lower mill 2350). Lower mill support portion 2340 has a
substantially columnar main body portion 2341, an engagement
protrusion portion 2342, and a powder scraping portion 2343. A
milling shaft 2345 is provided on a lower surface of main body
portion 2341 and extends downward. Milling shaft 2345 is coupled to
milling driving force coupling mechanism 2130. Lower mill support
portion 2340 is thus rotatable while it supports lower mill
2350.
[0458] Engagement protrusion portion 2342 is provided on an upper
surface of main body portion 2341 and protrudes upward. Engagement
protrusion portion 2342 is a site for locking lower mill 2350.
Powder scraping portion 2343 is provided around a circumferential
portion of main body portion 2341. Powder scraping portion 2343
scrapes off tea leaf powders stored in storage portion 2311 and
transports the tea leaf powders to discharge path 2312 as lower
mill support portion 2340 rotates.
[0459] Lower mill 2350 includes a main surface 2350a arranged to be
opposed to a main surface 2360a of upper mill 2360, a main surface
2350b located opposite to main surface 2350a, and a circumferential
surface connecting main surface 2350a and main surface 2350b to
each other. A plurality of shear grooves are formed in main surface
2350a of lower mill 2350. The plurality of shear grooves are
provided, for example, to extend along an equiangular spiral. The
plurality of shear grooves may be such that linear grooves
extending from an inner circumferential side toward an outer
circumference are radially provided.
[0460] An engagement recess portion 2352 is provided in main
surface 2350b of lower mill 2350. Engagement recess portion 2352 is
provided at a position corresponding to engagement protrusion
portion 2342 of lower mill support portion 2340 and locked by
engagement protrusion portion 2342. Lower mill 2350 rotates in
coordination with lower mill support portion 2340. A core 2359
extending upward along a core of a rotation shaft is provided in a
central portion of lower mill 2350.
[0461] Core 2359 is provided to pass through a through hole 2361
provided in a central portion of upper mill 2360. Core 2359 has a
helically provided helical blade 2359a.
[0462] Upper mill 2360 includes a main surface 2360a arranged to be
opposed to main surface 2350a of lower mill 2350, a main surface
2360b located opposite to main surface 2360a, and a circumferential
surface connecting main surface 2360a and main surface 2360b to
each other. A shear groove is formed in main surface 2360a of upper
mill 2360 as in main surface 2350a of the lower mill.
[0463] Upper mill 2360 is held by an upper mill holding member 2370
arranged above the upper mill. A not-shown hole portion is provided
in an upper surface of upper mill 2360. As a not-shown pin portion
provided in upper mill holding member 2370 enters the hole portion,
rotation of upper mill 2360 is prevented.
[0464] Upper mill holding member 2370 includes a bottom surface
portion 2371 provided with a hole portion 2371a, an outer
cylindrical portion 2372 erected upward from a circumference of
bottom surface portion 2371, and an inner cylindrical portion 2373
erected upward from a circumference of hole portion 2371a. Hole
portion 2371a is provided to communicate with through hole 2361 in
upper mill 2360. A spring 2381 pressing upper mill 2360 downward
and a spring holding member 2380 are accommodated in between outer
cylindrical portion 2372 and inner cylindrical portion 2373. Spring
2381 adjusts a grating pressure applied between upper mill 2360 and
lower mill 2350.
[0465] A hopper portion 2320 for supplying an object to be grated
in between upper mill 2360 and lower mill 2350 is attached to a
side of an upper end opening portion 2310b of milling case 2310.
Hopper portion 2320 has a top plate portion 2321, a cylindrical
portion 2322, and an object-to-be-grated inlet 2325. Top plate
portion 2321 has such a bowl shape that an opening portion 2323 is
provided substantially in a central portion. Cylindrical portion
2322 is provided to extend downward from a circumference of opening
portion 2323. Cylindrical portion 2322 is inserted in inner
cylindrical portion 2373.
[0466] Object-to-be-grated inlet 2325 is defined by opening portion
2323 and cylindrical portion 2322. A tip end side of core 2359 is
accommodated in object-to-be-grated inlet 2325. In cylindrical
portion 2322, a plurality of linear ribs 2391, 2392, and 2393 are
provided across object-to-be-grated inlet 2325.
[0467] In grating tea leaves, hopper portion 2320 is preferably
covered with a cover portion 2330. Thus, after tea leaves are
introduced into object-to-be-grated inlet 2325, entry of a foreign
matter into milling unit 2300 and scattering of grated tea leaves
can be prevented. When tea leaves are to be introduced, cover
portion 2330 is removed from hopper portion 2320.
[0468] Tea leaves introduced into object-to-be-grated inlet 2325
are accommodated in a space defined by the upper surface of upper
mill 2360 exposed through upper mill holding member 2370 and an
inner circumferential surface of cylindrical portion 2322. Tea
leaves accommodated in the space are guided in between upper mill
2360 and lower mill 2350 as helical blade 2359a rotates with
rotation of lower mill 2350.
[0469] Tea leaves guided in between upper mill 2360 and lower mill
2350 are grated and fall downward in a form of tea leaf powders
from a circumference of upper mill 2360 and lower mill 2350. Some
of fallen tea leaf powders is discharged through discharge path
2312 into tea leaf powder tray 2800 from outlet port 2312a. Other
fallen tea leaf powders are stored in storage portion 2311. Tea
leaf powders in storage portion 2311 are transported to discharge
path 2312 and discharged from outlet port 2312a into tea leaf
powder tray 2800 as powder scraping portion 2343 rotates with
rotation of lower mill support portion 2340.
[0470] (Structure of Agitation Unit 2500)
[0471] A structure of agitation unit 2500 will now be described
with reference to FIGS. 68 and 69. FIG. 68 is a perspective view of
agitation unit 2500 and FIG. 69 is a vertical cross-sectional view
of agitation unit 2500.
[0472] Agitation unit 2500 is in a shape of a container having an
opening upper surface and includes agitation tank 2510, agitation
blade 2550, an agitation cover 2530, and discharge mechanism 2540.
Agitation tank 2510 includes an exterior holder 2511 made of a
resin and a thermally insulated tank 2512 held by exterior holder
2511. An integrally resin molded grip 2520 is provided in exterior
holder 2511. Thermally insulated tank 2512 has opening portion 2513
which has a cylindrical shape with bottom and opens upward.
[0473] Agitation cover 2530 is attached to opening portion 2513 so
as to be able to open and close opening portion 2513. Agitation
cover 2530 is provided with a powder inlet 2531 for introducing tea
leaf powders grated by milling unit 2300 and a hot water supply
inlet 2532 through which hot water formed in apparatus main body
2100 is poured from hot water supply nozzle 2170. Hot water supply
inlet 2532 is provided at a position corresponding to supply port
2171 of hot water supply nozzle 2170.
[0474] Powder inlet 2531 and hot water supply inlet 2532
communicate with opening portion 2513. Tea leaf powders introduced
from moved tea leaf powder tray 2800 to powder inlet 2531 are
introduced into thermally insulated tank 512 through opening
portion 2513. Hot water poured through hot water supply inlet 2532
from hot water supply nozzle 2170 is supplied into thermally
insulated tank 2512 through opening portion 2513.
[0475] Agitation blade 2550 is placed on a bottom portion of
agitation tank 2510. A rotation shaft 2521 extending upward is
provided on the bottom portion of agitation tank 2510, and a
cylindrical core 2250 of agitation blade 2550 is inserted in this
rotation shaft 2521.
[0476] A permanent magnet 2240 is embedded in agitation blade 2550.
In agitation motor contactless table 2140A, permanent magnet 2240
embedded in agitation blade 2550 and permanent magnet 2141 provided
on a side of agitation motor unit 2140 are magnetically coupled in
a contactless state, so that rotational driving force of agitation
motor unit 2140 is transmitted to agitation blade 2550.
[0477] Agitation blade 2550 can be modified as appropriate so long
as the agitation blade is implemented as an agitation member having
an agitation element in an outer circumferential portion. A wound
portion formed from a wire in a toroidal shape or an impeller can
be adopted as the agitation element.
[0478] Discharge mechanism 2540 discharges tea prepared as a result
of agitation by agitation blade 2550. Discharge mechanism 2540 is
provided to be able to open and close discharge port 2541 provided
at the bottom portion of agitation tank 2510. As a user moves
operation lever 2542, opening and closing of discharge port 2541
and a discharge path for an agitated liquid which will be described
later can be switched (selected). As discharge port 2541 is opened,
tea in agitation tank 2510 is poured into a cup (not shown) placed
on placement base 2900.
[0479] (Details of Discharge Mechanism 2540)
[0480] FIG. 70 is a schematic cross-sectional view showing an
agitated liquid produced in the agitation unit according to the
present embodiment and a discharge mechanism. FIGS. 71 and 72 are
schematic cross-sectional views showing states that the discharge
mechanism shown in FIG. 70 is opened and a first discharge path and
a second discharge path are defined, respectively. A state of
agitated tea and details of discharge mechanism 2540 will be
described with reference to FIGS. 70 to 72.
[0481] As shown in FIG. 70, tea prepared as a result of agitation
by agitation blade 2550 is separated into second layer S2 small in
specific gravity and first layer S1 great in specific gravity due
to a difference in specific gravity. Second layer S2 small in
specific gravity is mainly composed of foams and first layer S1
great in specific gravity is composed of tea in which tea leaf
powders and hot water have substantially uniformly been agitated.
Foams are produced as a result of agitation of tea leaf powders and
hot water while air is taken into a liquid.
[0482] Discharge mechanism 2540 includes a lid member 2543, a
closing member 2545, a lift mechanism 2560, a cylindrical member
2570, and a discharge pipe 2590. Lid member 2543 is a site which
can open and close discharge port 2541 provided in a bottom portion
2510b of agitation tank 2510. Lid member 2543 is formed, for
example, from a gasket. Lid member 2543 is biased toward bottom
portion 2510b by such a biasing member as a spring. A lower surface
2543b of lid member 2543 is thus liquid tightly in contact with
bottom portion 2510b.
[0483] Lid member 2543 is provided to be movable in a direction
away from bottom portion 2510b against biasing force. Lid member
2543 is provided with a through hole 2544 in the center and is in
an annular shape. Through hole 2544 is provided to communicate with
discharge port 2541.
[0484] Closing member 2545 opens and closes through hole 2544
provided in lid member 2543 from a side of discharge port 2541.
Closing member 2545 is formed, for example, from a gasket. Closing
member 2545 is biased toward lid member 2543 by such a biasing
member as a spring. Thus, an upper surface 2545a of closing member
2545 is liquid tightly in contact with a lower surface 2543b of lid
member 2543. Closing member 2545 is in a disc shape having an outer
diameter larger than an inner diameter of through hole 2544.
[0485] Lift mechanism 2560 has operation lever 2542, a support
shaft 2547, and a push-up member 2546. Operation lever 2542 is
pivotally supported by support shaft 2547 around the shaft (in a
direction shown with DR1 in the figure). Push-up member 2546 is in
a shape, for example, of a column or a prism. Push-up member 2546
has an upper end fixed to a lower surface 2545b of closing member
2545 and has a lower end fixed to a tip end 2542a of operation
lever 2542. Push-up member 2546 moves in a vertical direction in
coordination with pivot of operation lever 2542.
[0486] Cylindrical member 2570 is arranged on an upper surface
2543a of lid member 2543 such that one end 2570a side surrounds
through hole 2544. An opening portion 2571 is provided on one end
2570a side of cylindrical member 2570. A suction port 2572 is
provided at the other end 2570b of cylindrical member 2570. Suction
port 2572 is located in the vicinity of a boundary portion K1
between first layer S1 and second layer S2. Specifically, suction
port 2572 is located slightly below boundary portion K1 between
first layer S1 and second layer S2.
[0487] Discharge pipe 2590 is provided to communicate with
discharge port 2541 provided in the bottom portion of agitation
tank 2510. Discharge pipe 2590 extends downward from a
circumference of discharge port 2541. Discharge pipe 2590
accommodates a part of lift mechanism 2560. Discharge pipe 2590
includes an exit portion 2591.
[0488] As shown in FIG. 71, when a user pivots downward (in a
direction shown with AR1 in the figure) a side of a base end
portion 2542b of operation lever 2542, push-up member 2546 moves
upward to thereby push up closing member 2545, lid member 2543, and
cylindrical member 2570. Here, a state that upper surface 2545a of
closing member 2545 is liquid tightly in contact with lower surface
2543b of lid member 2543 is maintained and a state that closing
member 2545 closes through hole 2544 is maintained.
[0489] As lid member 2543 is pushed upward and distant from
discharge port 2541, a gap is provided between lower surface 2543b
of lid member 2543 and bottom portion 2510b. Thus, agitation tank
2510 and discharge port 2541 communicate with each other, so that a
first discharge path through which tea containing first layer S1 is
discharged is defined. The first discharge path is defined by lower
surface 2543b of lid member 2543, bottom portion 2510b of agitation
tank 2510 in a portion opposed to the lower surface, and discharge
port 2541. In this case, tea containing first layer S1 flows
through the first discharge path as shown with an arrow AR10 in the
figure, is guided from discharge port 2541 to discharge pipe 2590,
and is discharged through exit portion 2591 of discharge pipe 2590
to the outside.
[0490] As shown in FIG. 72, when a user pivots upward (in a
direction shown with AR2 in the figure) a side of base end portion
2542b of operation lever 2542, push-up member 2546 moves downward.
With this movement, closing member 2545 fixed to push-up member
2546 also moves downward against biasing force which biases closing
member 2545 toward lid member 2543. Thus, closing member 2545 moves
away from through hole 2544, and a state that upper surface 2545a
of closing member 2545 is liquid tightly in contact with lower
surface 2543b of lid member 2543 is canceled. Since lower surface
2543b of lid member 2543 is maintained in a state that it is liquid
tightly in contact with the bottom portion by biasing force of
biasing toward the bottom portion of agitation tank 2510, a state
that lid member 2543 closes discharge port 2541 except for a
portion communicating with through hole 2544 is maintained.
[0491] Consequently, opening portion 2571 of cylindrical member
2570, through hole 2544 in lid member 2543, and discharge port 2541
communicate with one another, so that the second discharge path is
defined. The second discharge path is defined by an inner
circumferential surface of cylindrical member 2570, upper surface
2543a of lid member 2543 in a portion located on an inner side of
one end 2570a of cylindrical member 2570, through hole 2544, and
discharge port 2541. In this case, tea containing second layer S2
and first layer S1 is suctioned from suction port 2572 of
cylindrical member 2570, flows through the second discharge path as
shown with an arrow AR20 in the figure, is guided from discharge
port 2541 to discharge pipe 2590, and is discharged through exit
portion 2591 of discharge pipe 2590 to the outside.
[0492] Thus, discharge mechanism 2540 can switch (select) between
the first discharge path through which tea containing first layer
S1 is discharged and the second discharge path through which tea
containing at least second layer S2 is discharged, by switching
between directions of movement of base end portion 2542b of
operation lever 2542. Thus, a desired amount of tea containing the
second layer can be discharged in accordance with preference of a
user.
[0493] When first layer S1 is first discharged to the outside, a
liquid level of boundary portion K1 lowers with discharging. When
boundary portion K1 is lower than suction port 2572 of cylindrical
member 2570, second layer S2 cannot be discharged. Therefore, for
example, when three servings of tea are prepared as shown in FIG.
72, preferably, tea containing the second layer is first discharged
into three cups and then tea containing the first layer is
discharged into the three cups.
[0494] Discharge mechanism 2540 is constituted of pivotably
supported operation lever 2542 and push-up member 2546 which moves
in coordination with operation lever 2542. Therefore, it is not
necessary to electrically drive the discharge mechanism in
discharging, and a construction of discharge mechanism 2540 can
relatively be simplified.
[0495] As set forth above, agitation unit 2500 and beverage
preparation apparatus 2001 including the same according to the
present embodiment have a simplified construction, can agitate a
desired amount of a supplied liquid, and can reliably discharge a
liquid containing a layer small in specific gravity from an
agitated liquid prepared by agitation and separated into different
layers due to a difference in specific gravity.
Embodiment 16
[0496] FIG. 73 is a schematic cross-sectional view showing an
agitated liquid produced in an agitation unit according to the
present embodiment and a discharge mechanism. FIG. 74 is a
schematic cross-sectional view showing a state after some of the
agitated liquid has been discharged from the state shown in FIG.
73. An agitation unit 2500A according to the present embodiment
will be described with reference to FIGS. 73 and 74.
[0497] As shown in FIG. 73, agitation unit 2500A according to the
present embodiment is different from agitation unit 2500 according
to Embodiment 15 in including a float member 2595 and a structure
of a discharge mechanism 2540A, and substantially the same as that
in construction otherwise. Discharge mechanism 2540A is different
from discharge mechanism 2540 according to Embodiment 15 in
construction of a cylindrical member 2570A and substantially the
same as that in construction otherwise.
[0498] Cylindrical member 2570A has a first cylindrical portion
2575 and a second cylindrical portion 2576. First cylindrical
portion 2575 is located on one end 2570a side of cylindrical member
2570A. First cylindrical portion 2575 is fixed to upper surface
2543a of lid member 2543. A slide groove extending in the vertical
direction is provided in an outer circumferential surface of first
cylindrical portion 2575.
[0499] Second cylindrical portion 2576 is located on the other end
2570b side of cylindrical member 2570A. Second cylindrical portion
2576 is connected to first cylindrical portion 2575 and provided to
be slidable in the vertical direction over first cylindrical
portion 2575. Specifically, second cylindrical portion 2576 moves
in the vertical direction owing to buoyancy received from first
layer S1 by float member 2595 which will be described later.
[0500] A protrusion portion slidably fitted into the slide groove
in first cylindrical portion 2575 described above is provided on an
inner circumferential surface of second cylindrical portion 2576.
As the protrusion portion slides within the slide groove, the inner
circumferential surface of second cylindrical portion 2576 slides
over the outer circumferential surface of first cylindrical portion
2575. Suction port 2572 is provided on the upper end side of second
cylindrical portion 2576.
[0501] Float member 2595 is provided to sink in a liquid contained
in second layer S2 and to float on a liquid contained in first
layer S1 layer. Namely, specific gravity of the float member is set
to be greater than specific gravity of second layer S2 and smaller
than specific gravity of first layer S1. Thus, float member 2595
can follow displacement of boundary portion K1 between first layer
S1 and second layer S2.
[0502] Float member 2595 is disposed around suction port 2572.
Therefore, as float member 2595 follows displacement of boundary
portion K1 between first layer S1 and second layer S2, second
cylindrical portion 2576 moves with respect to first cylindrical
portion 2575 and a position of suction port 2572 varies as
following displacement of boundary portion K1.
[0503] As shown in FIG. 74, when tea containing first layer S1 is
discharged, a position of boundary portion K1 between first layer
S1 and second layer S2 moves downward as shown with an arrow in the
figure, from a position shown with a dashed line in the figure. A
position of float member 2595 moves downward as following variation
in position of boundary portion K1.
[0504] In second cylindrical portion 2576, float member 2595 floats
on first layer S1 owing to buoyancy received from first layer S1.
Therefore, with movement of float member 2595 downward, the
protrusion portion of second cylindrical portion 2576 moves
downward along the slide groove of first cylindrical portion 2575
so that second cylindrical portion 2576 moves downward. Thus, a
state that the position of suction port 2572 is located in the
vicinity of boundary portion K1 can be maintained.
[0505] The position of suction port 2572 is preferably located
slightly below boundary portion K1. Thus, tea containing second
layer S2 can be suctioned while tea containing first layer S1 is
suctioned. Therefore, tea containing second layer S2 can be
discharged more efficiently than in an example in which suction
port 2572 is located in second layer S2.
[0506] In agitation unit 2500A according to the present embodiment
as well, discharge mechanism 2540A has a simplified construction,
and switching between the first discharge path through which tea
containing first layer S1 is discharged and the second discharge
path through which tea containing second layer S2 is discharged can
be made by an operation of operation lever 2542 by a user.
[0507] Therefore, agitation unit 2500A according to the present
embodiment also obtains an effect substantially the same as the
effect of agitation unit 2500 according to Embodiment 15. In
agitation unit 2500A according to the present embodiment, even when
a position of boundary portion K1 between first layer S1 and second
layer S2 is displaced, a position of suction port 2572 through
which tea containing second layer S2 is suctioned varies as
following the position of boundary portion K1. Therefore, a user
can have tea containing second layer S2 discharged into a cup as
appropriate. Convenience is thus improved.
Embodiment 17
[0508] FIG. 75 is a schematic cross-sectional view showing an
agitated liquid produced in an agitation unit according to the
present embodiment and a discharge mechanism. FIG. 76 is a
schematic cross-sectional view showing a state that the discharge
mechanism of the agitation unit shown in FIG. 75 is opened to
define the second discharge path. An agitation unit 2500B according
to the present embodiment will be described with reference to FIGS.
75 and 76.
[0509] As shown in FIG. 75, agitation unit 2500B according to the
present embodiment is different from agitation unit 2500 according
to Embodiment 15 in a structure of a discharge mechanism 2540B. The
construction is otherwise substantially the same.
[0510] Discharge mechanism 2540B includes a first opening and
closing mechanism 2540B1 and a second opening and closing mechanism
2540B2. First opening and closing mechanism 2540B1 has a first lid
member 2548, a first lift mechanism 2560A, and a first discharge
pipe 2590A.
[0511] First lid member 2548 opens and closes a first discharge
port 2541A provided in bottom portion 2510b of agitation tank 2510.
First lid member 2548 is formed, for example, from a gasket. First
lid member 2548 is biased toward bottom portion 2510b by such a
biasing member as a spring. First lid member 2548 is thus liquid
tightly in contact with bottom portion 2510b.
[0512] First lift mechanism 2560A is substantially the same in
construction as lift mechanism 2560 according to Embodiment 15, and
has an operation lever 2542A, a support shaft 2547A, and a push-up
member 2546A. By pivoting operation lever 2542A downward around
support shaft 2547A, push-up member 2546A moves upward. Thus, first
lid member 2548 is pushed upward and a gap is provided between
first lid member 2548 and bottom portion 2510b.
[0513] Consequently, first discharge port 2541A is opened by first
opening and closing mechanism 2540B1 so that the first discharge
path through which tea containing first layer S1 is discharged is
defined. Tea containing first layer S1 flows through the first
discharge path, is guided from first discharge port 2541A to first
discharge pipe 2590A, and is discharged through an exit portion
2591A of first discharge pipe 2590A to the outside.
[0514] Second opening and closing mechanism 2540B2 has a second lid
member 2549, a second lift mechanism 2560B, a second discharge pipe
2590B, and a cylindrical member 2570B.
[0515] Second lid member 2549 opens and closes a second discharge
port 2541B provided in bottom portion 2510b of agitation tank 2510.
Second lid member 2549 is formed, for example, from a gasket.
Second lid member 2549 is biased toward bottom portion 2510b by
such a biasing member as a spring. Thus, second lid member 2549 is
liquid tightly in contact with bottom portion 2510b.
[0516] Second lift mechanism 2560B is substantially the same in
construction as lift mechanism 2560 according to Embodiment 15, and
has an operation lever 2542B, a support shaft 2547B, and a push-up
member 2546B. Operation lever 2542B is provided to be pivotable
around support shaft 2547B. Push-up member 2546B moves in the
vertical direction in coordination with pivot of operation lever
2542B.
[0517] Cylindrical member 2570B has a first cylindrical portion
2575B and a second cylindrical portion 2576B. First cylindrical
portion 2575B is located on one end side of cylindrical member
2570B. First cylindrical portion 2575B is in a shape of a cap
having a top plate portion. A lower end (an opening end) of first
cylindrical portion 2575B is provided to surround second discharge
port 2541B. Second lid member 2549 is accommodated in first
cylindrical portion 2575B. A connection portion for connecting
second cylindrical portion 2576 is provided in a ceiling portion of
first cylindrical portion 2575B.
[0518] Second cylindrical portion 2576B is located on the other end
side of cylindrical member 2570B. Second cylindrical portion 2576B
is connected to a top plate portion of first cylindrical portion
2575B. Second cylindrical portion 2576B has flexibility and is
provided to be movable with respect to first cylindrical portion
2575B. Specifically, second cylindrical portion 2576B deforms in
such a manner as being bent by buoyancy received from first layer
S1 by float member 2595. Second cylindrical portion 2576B is
smaller in inner diameter than first cylindrical portion 2575B.
[0519] Suction port 2572 is provided at an end portion of second
cylindrical portion 2576B located opposite to first cylindrical
portion 2575B. Float member 2595 similar to the float member
according to Embodiment 16 is disposed around suction port 2572. As
float member 2595 follows displacement of boundary portion K1,
second cylindrical portion 2576B moves with respect to first
cylindrical portion 2575B while second cylindrical portion 2576B
deforms as being bent. Thus, a position of the suction port varies
as following displacement of boundary portion K1.
[0520] As shown in FIG. 76, by pivoting operation lever 2542B
downward around support shaft 2547B, push-up member 2546B moves
upward. Thus, second lid member 2549 is pushed upward and a gap is
provided between bottom portion 2510b and second lid member
2549.
[0521] Consequently, opening portion 2571 of cylindrical member
2570B and second discharge port 2541B communicate with each other
so that the second discharge path is defined. The second discharge
path is defined by an inner circumferential surface of second
cylindrical portion 2576B, an inner surface of first cylindrical
portion 2575B, bottom portion 2510b in a portion located on an
inner side of an opening end of first cylindrical portion 2575B,
and second discharge port 2541B.
[0522] In this case, tea containing second layer S2 is suctioned
through suction port 2572, flows through the second discharge path
as shown with an arrow AR30 in the figure, is guided from second
discharge port 2541B to second discharge pipe 2590B, and is
discharged through an exit portion 2591B of second discharge pipe
2590B to the outside.
[0523] In agitation unit 2500B according to the present embodiment
as well, discharge mechanism 2540B has a simplified construction,
and switching between the first discharge path through which tea
containing first layer S1 is discharged and the second discharge
path through which tea containing second layer S2 is discharged can
be made by an operation of operation levers 2542A and 2542B by a
user.
[0524] Therefore, agitation unit 2500B according to the present
embodiment also obtains an effect substantially the same as the
effect of agitation unit 2500 according to Embodiment 15. In
agitation unit 2500B according to the present embodiment, even when
a position of boundary portion K1 between first layer S1 and second
layer S2 is displaced, a position of suction port 2572 through
which tea containing second layer S2 is suctioned varies as
following the position of boundary portion K1. Therefore, a user
can have tea containing second layer S2 discharged into a cup as
appropriate. Convenience is thus improved.
Embodiment 18
[0525] FIG. 77 is a schematic cross-sectional view showing an
agitated liquid produced in an agitation unit according to the
present embodiment and a discharge mechanism. FIG. 78 is a front
view of the discharge mechanism shown in FIG. 77. FIG. 79 is a
schematic cross-sectional view showing a state that the discharge
mechanism shown in FIG. 77 is opened to discharge an agitated
liquid. An agitation unit 2500C according to the present embodiment
will be described with reference to FIGS. 77 to 79.
[0526] As shown in FIGS. 77 and 78, agitation unit 2500C according
to the present embodiment is different from agitation unit 2500
according to Embodiment 15 in a construction of a discharge
mechanism 2540C.
[0527] Discharge mechanism 2540C includes an opening and closing
mechanism 2580 switching between an open state and a closed state
of an opening portion 2572C provided on a side surface side of
agitation tank 2510 and a discharge pipe 2586. As will be described
later, opening portion 2572C functions as a suction port through
which tea containing first layer S1 and second layer S2 is
suctioned. Opening portion 2572C is provided from an upper side to
a bottom portion of the side surface with a prescribed width (a
length in the lateral direction in FIG. 78). An upper end of
opening portion 2572C is located above boundary portion K1 between
first layer S1 and second layer S2.
[0528] Opening and closing mechanism 2580 includes a lid member
2584, a support shaft 2585, a cam 2581, an operation lever 2582,
and an operation shaft 2583. Lid member 2584 opens and closes
opening portion 2572C provided in the side surface of agitation
tank 2510 from an inner side of agitation tank 2510. Lid member
2584 is provided to be pivotable around support shaft 2585. Lid
member 2584 is formed, for example, from a gasket. Lid member 2584
is biased toward the side surface of agitation tank 2510 by such a
biasing member as a spring. Thus, lid member 2584 is liquid tightly
in contact with bottom portion 2510b of agitation tank 2510 and the
side surface around opening portion 2572C.
[0529] Operation lever 2582 is provided to be pivotable around
operation shaft 2583. Cam 2581 is pivotally provided in
coordination with pivot of operation lever 2582. Cam 2581 pivots
around operation shaft 2583.
[0530] Discharge pipe 2586 is provided to surround opening portion
2572C from an outer side of the side surface of agitation tank
2510. Discharge pipe 2586 extends downward. Discharge pipe 2586 has
an exit portion 2587. Exit portion 2587 is located at a position
lower than bottom portion 2510b of agitation tank 2510. Cam 2581,
operation shaft 2583, and a part of operation lever 2582 described
above are accommodated in discharge pipe 2586.
[0531] As shown in FIG. 79, when a user pivots a base end portion
2582b of operation lever 2582 downward (in a direction shown with
AR3 in the figure), cam 2581 pushes lid member 2584 into agitation
tank 2510 against biasing force applied to lid member 2584. Thus, a
gap is provided between the side surface of agitation tank 2510 and
lid member 2584. Thus, as shown with an arrow AR40 in the figure,
tea containing second layer S2 and first layer S1 is guided from
opening portion 2572C to discharge pipe 2586 and discharged through
exit portion 2587 of discharge pipe 2586 to the outside. Tea
containing first layer S1 and second layer S2 can thus be poured
into a cup.
[0532] Thus, in the present embodiment, tea containing first layer
S1 and second layer S2 can be discharged and tea containing second
layer S2 which makes a taste milder can reliably be discharged.
[0533] In agitation unit 2500C according to the present embodiment
as well, discharge mechanism 2540C is constituted of pivotably
supported operation lever 2582 and cam 2581 which moves in
coordination with operation lever 2582. Therefore, it is not
necessary to electrically drive the discharge mechanism in
discharging, and a construction of discharge mechanism 2540C can be
simplified.
[0534] Thus, agitation unit 2500C according to the present
embodiment can obtain an effect substantially the same as the
effect of agitation unit 2500 according to Embodiment 15.
Embodiment 19
[0535] FIG. 80 is a schematic cross-sectional view showing an
agitated liquid produced in an agitation unit according to the
present embodiment and a discharge mechanism. An agitation unit
2500D according to the present embodiment will be described with
reference to FIG. 80.
[0536] As shown in FIG. 80, agitation unit 2500D according to the
present embodiment is different from any of the embodiments in a
shape of an agitation tank 2510D and a construction of a discharge
mechanism 2540D. The construction is otherwise substantially the
same.
[0537] Agitation tank 2510D is in a shape like a staircase.
Specifically, agitation tank 2510D includes a first bottom portion
2510b1, a second bottom portion 2510c, a third bottom portion
2510d, a first side wall portion 2514, a second side wall portion
2515, and a third side wall portion 2516. First bottom portion
2510b1 among first bottom portion 2510b1, second bottom portion
2510c, and third bottom portion 2510d is located at a position most
distant from an opening surface 2513a of agitation tank 2510D in a
direction of depth. Second bottom portion 2510c is located above
first bottom portion 2510b1. Third bottom portion 2510d is located
above second bottom portion 2510c.
[0538] First side wall portion 2514 is provided to connect first
bottom portion 2510b1 and second bottom portion 2510c to each
other. Second side wall portion 2515 is provided to connect second
bottom portion 2510c and third bottom portion 2510d to each other.
Third side wall portion 2516 is provided to be erected upward from
a periphery of third bottom portion 2510d.
[0539] Discharge mechanism 2540D includes a first opening and
closing mechanism 2540D1, a second opening and closing mechanism
2540D2, and a third opening and closing mechanism 2540D3. First
opening and closing mechanism 2540D1 is provided to be able to
switch between an open state and a closed state of first discharge
port 2541A provided in first bottom portion 2510b1. First opening
and closing mechanism 2540D1 is substantially the same in
construction as first opening and closing mechanism 2540B1
according to Embodiment 17. In this case, operation levers 2542A to
2542C are provided to extend in a direction perpendicular to the
drawing.
[0540] In first opening and closing mechanism 2540D1, push-up
member 2546A is moved upward by pivoting a base end portion of
operation lever 2542A downward. Thus, a lid member 2548A is pushed
upward and a gap is provided between lid member 2548A and first
bottom portion 2510b1.
[0541] Consequently, first discharge port 2541A is opened by first
opening and closing mechanism 2540D1, so that the first discharge
path through which tea containing first layer S1 is discharged is
defined. Tea containing first layer S1 flows through the first
discharge path, is guided from first discharge port 2541A to first
discharge pipe 2590A, and is discharged through exit portion 2591A
of first discharge pipe 2590A to the outside.
[0542] Second opening and closing mechanism 2540D2 is provided to
be able to switch between an open state and a closed state of
second discharge port 2541B provided in second bottom portion
2510c. Third opening and closing mechanism 2540D3 is provided to be
able to switch between an open state and a closed state of third
discharge port 2541C provided in third bottom portion 2510d. Second
opening and closing mechanism 2540D2 and third opening and closing
mechanism 2540D3 are substantially the same in construction as
first opening and closing mechanism 2540D1. Thus, by performing an
operation the same as the operation of first opening and closing
mechanism 2540D1, tea is discharged through exit portion 2591B of
second discharge pipe 2590B of second opening and closing mechanism
2540D2 and an exit portion 2591C of a third discharge pipe 2590C of
third opening and closing mechanism 2540D3 to the outside.
[0543] Operation lever 2542B of second opening and closing
mechanism 2540D2 and operation lever 2542C of third opening and
closing mechanism 2540D3 are located at positions as high as the
position of operation lever 2542A of first opening and closing
mechanism 2540D1, and exit portion 2591B of second discharge pipe
2590B of second opening and closing mechanism 2540D2 and exit
portion 2591C of third discharge pipe 2590C of third opening and
closing mechanism 2540D3 are located at positions as high as the
position of exit portion 2591A of first discharge pipe 2590A of
first opening and closing mechanism 2540D1.
[0544] Thus, second discharge pipe 2590B and push-up member 2546B
of second opening and closing mechanism 2540D2 are longer in length
than first discharge pipe 2590A and push-up member 2546A of first
opening and closing mechanism 2540D1, respectively.
[0545] Third discharge pipe 2590C and push-up member 2546C of third
opening and closing mechanism 2540D3 are longer in length than
second discharge pipe 2590B and push-up member 2546B of second
opening and closing mechanism 2540D2, respectively.
[0546] In agitation unit 2500D, when boundary portion K1 between
first layer S1 and second layer S2 is located above third bottom
portion 2510d, initially, third discharge port 2541C is opened with
the use of third opening and closing mechanism 2540D3, so that tea
containing first layer S1 and second layer S2 can be discharged
through third discharge port 2541C to the outside.
[0547] Specifically, by pushing up lid member 2548C by operating
operation lever 2542C, a gap is provided between lid member 2548C
and third bottom portion 2510d. Thus, a discharge path through
which tea is discharged is defined. In this case, the discharge
path functions as the second discharge path. Tea containing first
layer S1 and second layer S2 flows through the discharge path, is
guided from third discharge port 2541C to third discharge pipe
2590C, and is discharged through exit portion 2591C of third
discharge pipe 2590C into a cup.
[0548] In succession, as described above, by opening first
discharge port 2541A by using first opening and closing mechanism
2540D1, tea containing first layer S1 is discharged through first
discharge port 2541A into a cup. Thus, tea in which second layer S2
and first layer S1 are mixed can be prepared in a cup.
[0549] When boundary portion K1 between first layer S1 and second
layer S2 is located between second bottom portion 2510c and third
bottom portion 2510d, tea can be discharged through second
discharge port 2541B to the outside by opening second discharge
port 2541B by using second opening and closing mechanism
2540D2.
[0550] Specifically, by pushing up lid member 2548B by operating
operation lever 2542B, a gap is provided between lid member 2548B
and second bottom portion 2510c. A discharge path through which tea
is discharged is thus defined. In this case, the discharge path
functions as the second discharge path. Tea containing first layer
S1 and second layer S2 flows through the discharge path, is guided
from second discharge port 2541B to second discharge pipe 2590B,
and is discharged through exit portion 2591B of second discharge
pipe 2590B to the outside.
[0551] In succession, as described above, by opening first
discharge port 2541A by using first opening and closing mechanism
2540D1, tea containing first layer S1 is discharged through first
discharge port 2541A into a cup. Thus, tea in which second layer S2
and first layer S1 are mixed can be prepared in a cup.
[0552] Agitation unit 2500D according to the present embodiment can
thus also discharge tea containing first layer S1 and second layer
S2 by selecting as appropriate a discharge port to be opened by
selecting an opening and closing mechanism in accordance with a
position of boundary portion K1 between first layer S1 and second
layer S2, and can reliably discharge tea containing second layer S2
which makes a taste milder.
[0553] In agitation unit 2500D according to the present embodiment
as well, discharge mechanism 2540D is constituted of a pivotably
supported operation lever and a push-up member which moves in
coordination with the operation lever. Therefore, it is not
necessary to electrically drive the discharge mechanism in
discharging, and a construction of discharge mechanism 2540D can be
simplified.
[0554] As set forth above, agitation unit 2500D according to the
present embodiment can also obtain an effect substantially the same
as the effect of agitation unit 2500 according to Embodiment
15.
[0555] Though an example in which operation levers 2542A, 2542B,
and 2542C are at the same height in agitation unit 2500D according
to the present embodiment is illustrated and described, limitation
thereto is not intended and positions of these operation levers can
be varied as appropriate.
[0556] Though an example in which agitation unit 2500D according to
the present embodiment includes agitation tank 2510 provided in a
form of a staircase including two steps is illustrated and
described, limitation thereto is not intended. The agitation tank
may be provided in a form of a staircase including one step or in a
form of a staircase including three or more steps. In this case, an
opening and closing mechanism is provided in accordance with the
number of bottom portions which form the steps.
[0557] Though an example in which beverage preparation apparatus
2001 includes agitation unit 2500 according to Embodiment 15 is
illustrated and described in Embodiment 15 above, limitation
thereto is not intended and the beverage preparation apparatus may
include agitation units 2500A to 2500D according to Embodiments 16
to 5.
[0558] Though an example in which the agitation tank is constituted
of the exterior holder and the thermally insulated tank is
illustrated and described in Embodiments 15 to 5 above, limitation
thereto is not intended and the agitation tank may consist of the
thermally insulated tank. A container not having thermal insulation
but having heat resistance may be employed instead of the thermally
insulated tank.
[0559] Though an example in which tea as a beverage is prepared by
agitating hot water as a liquid and tea leaf powders as powders in
the agitation unit according to Embodiments 15 to 5 above is
illustrated and described, limitation thereto is not intended. A
foamed beverage such as milk foam may be prepared by agitating a
liquid for a beverage such as milk alone, or a mixed beverage
obtained by agitating a plurality of liquids for a beverage
different in specific gravity may be prepared.
[0560] Though the embodiments and the examples of the present
invention have been described above, the embodiments and the
examples disclosed herein are illustrative and non-restrictive in
every respect. The scope of the present invention is defined by the
terms of the claims and is intended to include any modifications
within the scope and meaning equivalent to the terms of the
claims.
REFERENCE SIGNS LIST
[0561] 1 beverage preparation apparatus; 100 apparatus main body;
110 control unit; 120 milling motor unit; 130 milling driving force
coupling mechanism; 140 agitation motor unit; 140A contactless
table; 141 permanent magnet; 150 hot water supply pipe; 155 liquid
supply path; 160 heater; 170 hot water supply nozzle; 171 supply
port; 180 milling unit attachment portion; 190 agitation tank
attachment portion; 195 liquid storage tank attachment portion; 210
first paddle; 210a accommodation portion; 210h space; 211 second
paddle; 212 paddle surface; 220 blade portion; 220a upper surface;
221 blade piece; 222 lower auxiliary ring; 223 upper auxiliary
ring; 240 permanent magnet; 250 cylindrical core; 251 conical cap;
252 ring seal; 253 through hole; 260a cover; 260b paddle main body;
300 milling unit; 300W window for coupling; 310 milling case; 310b
upper end opening portion; 311 storage portion; 312 discharge path;
312a outlet port; 320 hopper portion; 321 top plate portion; 322
cylindrical portion; 323 opening portion; 325 object-to-be-grated
inlet; 330 cover portion; 340 lower mill support portion; 341 main
body portion; 342 engagement protrusion portion; 343 powder
scraping portion; 345 milling shaft; 350 lower mill; 350a, 350b
main surface; 352 engagement recess portion; 359 core; 359a helical
blade; 360 upper mill; 360a, 360b main surface; 361 through hole;
370 upper mill holding member; 371 bottom surface portion; 371a
hole portion; 372 outer cylindrical portion; 373 inner cylindrical
portion; 380 spring holding member; 381 spring; 391, 392, 393 rib;
500 agitation unit; 510, 510A, 510B, 510C 510D, 510E, 510F, 510G,
510H, 510X agitation tank; 510a inner circumferential surface; 510c
helically extending surface; 511 exterior holder; 512, 512A, 512B,
512C, 512D, 512E, 512F, 512G, 512H, 512X thermally insulated tank;
513 opening portion; 514 bottom portion; 515, 515B, 515C, 515D,
515E, 515F, 515G, 515H, 515X side wall portion; 516 first
cylindrical portion; 517 second cylindrical portion; 518 third
cylindrical portion; 520 grip; 530 agitation cover; 531 powder
inlet; 532 hot water supply inlet; 540 discharge port opening and
closing mechanism; 541 discharge port; 542 operation lever; 543
opening and closing nozzle; 545 discharge portion; 550 agitation
blade; 560 rotation shaft; 571, 571C, 571F, 571G connection
portion; 572 curved portion; 573 flat portion; 573C inclined
portion; 574, 574C connection portion; 575 curved portion; 576 flat
portion; 576C inclined portion; 700 liquid storage tank; 710 tank
main body; 720 lid portion; 800 tea leaf powder tray; 900 placement
base; 1001, 1001D beverage preparation apparatus; 1100 apparatus
main body; 1110 control unit; 1112 input portion; 1115 sensing
device; 1116 agitation tank sensing device; 1120 milling motor
unit; 1130 milling driving force coupling mechanism; 1140 agitation
motor unit; 1140A agitation motor contactless table; 1141 permanent
magnet; 1150 hot water supply pipe; 1155 liquid supply path; 1160
heater; 1170 hot water supply nozzle; 1171 supply port; 1180
milling unit attachment portion; 1190 agitation tank attachment
portion; 1195 liquid storage tank attachment portion; 1240
permanent magnet; 1250 cylindrical core; 1300 milling unit; 1300W
window for coupling; 1310 milling case; 1310b upper end opening
portion; 1311 storage portion; 1312 discharge path; 1312a outlet
port; 1320 hopper portion; 1321 top plate portion; 1322 cylindrical
portion; 1323 opening portion; 1325 object-to-be-grated inlet; 1330
cover portion; 1340 lower mill support portion; 1341 main body
portion; 1342 engagement protrusion portion; 1343 powder scraping
portion; 1345 milling shaft; 1350 lower mill; 1352 engagement
recess portion; 1359 core; 1359a blade portion; 1360 upper mill;
1361 through hole; 1370 upper mill holding member; 1371 bottom
surface portion; 1371a hole portion; 1372 outer cylindrical
portion; 1373 inner cylindrical portion; 1380 spring holding
member; 1381 spring; 1391, 1392, 1393 rib; 1500 agitation unit;
1510 agitation tank; 1511 exterior holder; 1512 thermally insulated
tank; 1513 opening portion; 1520 grip; 1530 agitation cover; 1531
powder inlet; 1532 hot water supply inlet; 1540 discharge
mechanism; 1541 discharge port; 1542 operation lever; 1543 opening
and closing nozzle; 1550 agitation blade; 1560 rotation shaft; 1700
liquid storage tank; 1710 tank main body; 1720 lid portion; 1800
tea leaf powder tray; 1900 placement base; 2001 beverage
preparation apparatus; 2100 apparatus main body; 2110 control unit;
2120 milling motor unit; 2130 milling driving force coupling
mechanism; 2140 agitation motor unit; 2140A contactless table; 2141
permanent magnet; 2150 hot water supply pipe; 2155 liquid supply
path; 2160 heater; 2170 hot water supply nozzle; 2171 supply port;
2180 milling unit attachment portion; 2190 agitation tank
attachment portion; 2195 liquid storage tank attachment portion;
2240 permanent magnet; 2250 cylindrical core; 2300 milling unit;
2300W window for coupling; 2310 milling case; 2310b upper end
opening portion; 2311 storage portion; 2312 discharge path; 2312a
outlet port; 2320 hopper portion; 2321 top plate portion; 2322
cylindrical portion; 2323 opening portion; 2325 object-to-be-grated
inlet; 2330 cover portion; 2340 lower mill support portion; 2341
main body portion; 2342 engagement protrusion portion; 2343 powder
scraping portion; 2345 milling shaft; 2350 lower mill; 2352
engagement recess portion; 2359 core; 2359a helical blade; 2360
upper mill; 2361 through hole; 2370 upper mill holding member; 2371
bottom surface portion; 2371a hole portion; 2372 outer cylindrical
portion; 2373 inner cylindrical portion; 2380 spring holding
member; 2381 spring; 2391, 2392, 2393 rib; 2500, 2500A, 2500B,
2500C, 2500D agitation unit; 2510, 2510C, 2510D agitation tank;
2510b bottom portion; 2510b1 first bottom portion; 2510c second
bottom portion; 2510d third bottom portion; 2511 exterior holder;
2512 thermally insulated tank; 2513 opening portion; 2514 first
side wall portion; 2515 second side wall portion; 2516 third side
wall portion; 2520 grip; 2521 rotation shaft; 2530 agitation cover;
2531 powder inlet; 2532 hot water supply inlet; 2540, 2540A, 2540B,
2540C, 2540D discharge mechanism; 2540B1, 2540D1 first opening and
closing mechanism; 2540B2, 2540D2 second opening and closing
mechanism; 2540D3 third opening and closing mechanism; 2541
discharge port; 2541A first discharge port; 2541B second discharge
port; 2541C third discharge port; 2542, 2542A, 2542B, 2542C
operation lever; 2543 lid member; 2544 through hole; 2545 closing
member; 2546, 2546A, 2546B, 2546C push-up member; 2547, 2547A,
2547B support shaft; 2548 first lid member; 2548A, 2548B, 2548C lid
member; 2549 second lid member; 2550 agitation blade; 2560 lift
mechanism; 2560A first lift mechanism; 2560B second lift mechanism;
2570, 2570A, 2570B cylindrical member; 2571 opening portion; 2572
suction port; 2572C opening portion; 2575, 2575B first cylindrical
portion; 2576, 2576B second cylindrical portion; 2580 opening and
closing mechanism; 2581 cam; 2582 operation lever; 2583 operation
shaft; 2584 lid member; 2585 support shaft; 2586 discharge pipe;
2587 exit portion; 2590 discharge pipe; 2590A first discharge pipe;
2590B second discharge pipe; 2590C third discharge pipe; 2591,
2591A, 2591B exit portion; 2595 float member; 2700 liquid storage
tank; 2710 tank main body; 2720 lid portion; 2800 tea leaf powder
tray; and 2900 placement base.
* * * * *